Poincaré Conjecture - Numberphile

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  • เผยแพร่เมื่อ 24 พ.ย. 2024

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  • @Misterlegoboy
    @Misterlegoboy 8 ปีที่แล้ว +7851

    what a badass- he solves one of the 7 hardest problems in the world and then just drops the mic and leaves

    • @PhilosopherRex
      @PhilosopherRex 8 ปีที่แล้ว +856

      There are amazing people walking this world and I suspect that most of them we've never heard of.

    • @nemooutis-marcusboateng7459
      @nemooutis-marcusboateng7459 7 ปีที่แล้ว +446

      Misterlegoboy he's probably pulling a gauss on us and after he dies we'll find fantastic work is left

    • @Redheisenberg
      @Redheisenberg 7 ปีที่แล้ว +102

      That's not being a badass. That's being edgy

    • @user-tm1ix7xi1n
      @user-tm1ix7xi1n 7 ปีที่แล้ว +216

      He is a great mathematician

    • @CdFMasterVideo
      @CdFMasterVideo 7 ปีที่แล้ว +612

      You forgot to say that he isolated himself for seven years, working on nothing but this legendary problem, until the day he unveiled his discovery...and after that he disappeared again.
      Yes that's epic. No dragonborn or heir of Isildur ever lived with more epicness.

  • @thefakeslimshady8881
    @thefakeslimshady8881 4 ปีที่แล้ว +2848

    Gregori solved this question alone in his room which contains only a desk, a bed, a lamp, and a chair. And then quit all of mathematics after this. What a guy

    • @pawankhanal8472
      @pawankhanal8472 3 ปีที่แล้ว +66

      Really he quit all mathematics ?

    • @thefakeslimshady8881
      @thefakeslimshady8881 3 ปีที่แล้ว +28

      @@pawankhanal8472 yep

    • @pawankhanal8472
      @pawankhanal8472 3 ปีที่แล้ว +141

      @@thefakeslimshady8881 But people says he is working on Navier stokes equations- other millinium prize problem.

    • @thefakeslimshady8881
      @thefakeslimshady8881 3 ปีที่แล้ว +33

      @@pawankhanal8472 I mean I'm just recounting what I've heard from other sources and they said he just quit

    • @pawankhanal8472
      @pawankhanal8472 3 ปีที่แล้ว +207

      @@thefakeslimshady8881 doesn't matter. He proved to be genius and that's enough. History will remember him.

  • @TheNuncFluens
    @TheNuncFluens 10 ปีที่แล้ว +5865

    An interview with Perelman would be the ultimate Numberphile video.

    • @General12th
      @General12th 7 ปีที่แล้ว +716

      No.
      An interview with *Euler* would be the ultimate Numberphile video.

    • @nemooutis-marcusboateng7459
      @nemooutis-marcusboateng7459 7 ปีที่แล้ว +215

      Gauss.

    • @MIZORAM_mafaka_hnamte
      @MIZORAM_mafaka_hnamte 7 ปีที่แล้ว +74

      NuncFluens *Totally agree, bro but he didn't want it*

    • @ПрикладнаЕкономіка
      @ПрикладнаЕкономіка 6 ปีที่แล้ว +54

      prabably he is not 100% mental healthy.

    • @Adam270978
      @Adam270978 6 ปีที่แล้ว +41

      Прикладна Економіка, у него есть некоторые признаки синдрома Аспергера, но он не псих. Просто у него проблемы с социализацией.

  • @luck3949
    @luck3949 7 ปีที่แล้ว +3436

    Hardness of math problems:
    0. I can solve the problem
    1. I can understand the solution of the problem
    2. I can't understand the solution of the problem
    3. I can't understand the problem
    4. I can't understand why it is not obvious

    • @ericsmith116
      @ericsmith116 4 ปีที่แล้ว +70

      any its at all levels of math.

    • @rockskate15
      @rockskate15 4 ปีที่แล้ว +80

      Under rated comment.

    • @chabichabi3932
      @chabichabi3932 4 ปีที่แล้ว +19

      Where is obvious things in math?

    • @luck3949
      @luck3949 4 ปีที่แล้ว +248

      @@chabichabi3932 For me it seems "obvious", that Collatz Conjecture is true, because there is always a chance to hit a number that will bring the sequence down to the "known area" where sequence reaches 1. But greatest mathematicians of humanity can't solve it for decades, and say that the problem is so hard that it is completely out of range of modern mathematics. So obviously, the fact that answer is "obvious" for me, only reveals that I completely misunderstand math, related to the problem.

    • @equim7363
      @equim7363 4 ปีที่แล้ว +7

      @@luck3949 you so smart

  • @francescorende9987
    @francescorende9987 8 ปีที่แล้ว +2003

    do a video on every millenium prize problem

    • @nicholaschin8804
      @nicholaschin8804 5 ปีที่แล้ว +12

      Navier-Stokes was out this week! =D

    • @anthonyymm511
      @anthonyymm511 4 ปีที่แล้ว +10

      Hodge conjecture might be hard to explain.

    • @epicswirl
      @epicswirl 4 ปีที่แล้ว +6

      P=NP really intrigues me because I’m a computer scientist. I really wanna solve it!

    • @tazogochitashvili6514
      @tazogochitashvili6514 4 ปีที่แล้ว

      @@epicswirl So here's what I've been thinking, since NP-class problems need Polynomial time to check the answer to, doesn't that mean that the problem of P vs NP is a question beyond NP itself? We haven't been able to prove that one of the two solutions are correct, but what if we're just going the wrong way?

    • @epicswirl
      @epicswirl 4 ปีที่แล้ว +4

      Tazo Gochitashvili we can prove NP problems and even solve them in exponential time. The problem is we need an algorithm to do it in polynomial time like O(n^3). You may end up being correct that P=NP is unsolvable, but that needs to be proven and the $1 million will be awarded. If they can be solved in poly time then cancer could be cured theoretically. That is the solution we want. Perhaps we’re just looking at the problem from the wrong angle.

  • @JanPBtest
    @JanPBtest 8 ปีที่แล้ว +2198

    This video never mentions one major hero of the story, the inventor of the Ricci flow himself: Richard Hamilton. This is almost like talking about relativity without ever mentioning Einstein. Perelman's achievement is undeniable, of course, but Hamilton did a lot of heavy lifting beginning with the early 1980s. In fact, one of the reasons Perelman rejected the Fields medal and other prizes was that the people who were in charge of awarding them refused (apparently) to make the prizes shared with Hamilton.

    • @cclifford1003
      @cclifford1003 8 ปีที่แล้ว +43

      nice input 👍

    • @Netro1992
      @Netro1992 8 ปีที่แล้ว +8

      You mean Poincare.

    • @SJ-to3dt
      @SJ-to3dt 8 ปีที่แล้ว +140

      I'm not really trained as a mathematician, I'm an engineer. But I have developed immense fascination with the dynamics of the events that took place around the awarding of the prizes for the proof of the Poincare conjecture (No background in topology).. It is just fascinating to see that Hamilton wasn't selected to share the prize and I also read that the mathematical community didn't take any action against the Chinese who wanted to steal Grigori's work. All these things and dynamics just gives you a chill in the spine =O

    • @JanPBtest
      @JanPBtest 8 ปีที่แล้ว +16

      *****
      (1) What you say is not relevant to what I said. (2) No, relativity was NOT discovered by Poincare. This is one of the standard claims by the anti-relativity crackpot crowd. Poincare came very close, true. This subject has been very well researched, I have no space here to dicuss it in more detail. Do your research. I'm not going to respond any further.

    • @zoetropo1
      @zoetropo1 7 ปีที่แล้ว +59

      Perelman should simply have given half the prize to Hamilton. Who cares what the committee scrawls?

  • @dmitriysoloviev4423
    @dmitriysoloviev4423 7 ปีที่แล้ว +2804

    Perelman refused to take any prize, thereby create Perelman Conjecture. Now mathematician trying to understand why.

    • @nischay4719
      @nischay4719 6 ปีที่แล้ว +9

      Dmitriy Soloviev 😂😂😂

    • @John-lf3xf
      @John-lf3xf 6 ปีที่แล้ว +5

      Dmitriy Soloviev 😂

    • @hakinadedeji
      @hakinadedeji 5 ปีที่แล้ว +54

      You will need to ask the psychologists for that conjecture. They need to know what was going on in his brain

    • @makecba
      @makecba 5 ปีที่แล้ว +81

      I read somewhere that he thought he didn't deserve the prise any more than any other mathematician that made any contribution to the field before him

    • @makecba
      @makecba 5 ปีที่แล้ว +31

      i.e.: the famous "standing on the shoulders of giants"

  • @dmitrymorozov1579
    @dmitrymorozov1579 10 ปีที่แล้ว +1974

    ignoring the money he just wants to show that there is something wrong with our world. Some of his ex-partners in math betrayed him, he thought that that the world of math is the only place where people are moral and pure in their thoughts. But it turned our that even a mathematical society is full of bustards craving for money and the fame. We are a dirt world, and he is a just a saint Man. That's it. I proud of that such a person lives in my county.

    • @potenvandebizon
      @potenvandebizon 10 ปีที่แล้ว +75

      Well said. I think logic shouldn't be commercialized, though a symbol, like the medal, for his deeds might be in place. Or he might think that logic is above honor in that sense. Anyway he made the right choice with the money.

    • @wajideu5005
      @wajideu5005 10 ปีที่แล้ว +86

      I would try to solve the problem just for the fun of it. I wouldn't turn down the prize money though. Not because I'm greedy, but because I have things I want to do in my life and money is a factor I would enjoy not having to worry about.
      Not to mention, turning a reward down just to be self righteous is ignorant and disrespectful imo. It'd be like joining a marathon, winning, and then rejecting the trophy. It's practically spitting in people's faces. If you don't want the trophy, don't join the marathon so someone else can enjoy the reward for the time and effort they put in.

    • @kabascoolr
      @kabascoolr 9 ปีที่แล้ว +162

      Waji Deu Your view of the world is a very bleak. It's more likely than not that if he had your mentality, he wouldn't be in the position to solve that problem.

    • @wajideu5005
      @wajideu5005 9 ปีที่แล้ว +50

      kabascoolr Everyone needs money. It makes the world go round. I'd rather be bleak and content than foolish and regretful.

    • @kabascoolr
      @kabascoolr 9 ปีที่แล้ว +100

      Waji Deu You're already foolish. Not everyone holds your foolish views.

  • @TheUneuro
    @TheUneuro 10 ปีที่แล้ว +941

    As a mathematician, I respect so much what you do Brady ! Thank you :)

    • @naeemkuzco2525
      @naeemkuzco2525 7 ปีที่แล้ว +9

      TheUneuro 2+2=.?

    • @Kosekans
      @Kosekans 7 ปีที่แล้ว +19

      3,999... repeating

    • @kkiller1438
      @kkiller1438 5 ปีที่แล้ว +2

      @@naeemkuzco2525 4-1=3 quick maffs

    • @randomdude9135
      @randomdude9135 5 ปีที่แล้ว

      @@kkiller1438 yeah

    • @badam9656
      @badam9656 4 ปีที่แล้ว

      Mathematician with 17k subs and no vids

  • @manishamohanty244
    @manishamohanty244 3 ปีที่แล้ว +176

    " Some people can't be bought or bargained with, they just want to see the world learn. "

  • @Upgradezz
    @Upgradezz 3 ปีที่แล้ว +22

    He has a gold heart. Humble, and sincere.

    • @sergeyromanov5560
      @sergeyromanov5560 5 หลายเดือนก่อน

      he is not. he could have donated the 1 mln. to orphans. he is a crank.

  • @ErwinSchrodinger64
    @ErwinSchrodinger64 10 ปีที่แล้ว +365

    While a very intriguing story, I'm surprised there were no reasons given why Dr. Perelman declined the money, fame, and accolades. His reasons, on some parts, I completely agree... many fields become doctrines that are devised by a very selected few. Science and mathematics are seriously suffering from a lack of openness to new ideas because of these centralized ideas (string theory, molecular quantum mechanics, and so forth). Unfortunately, not only is his intelligence and insight incredible but the his level of humbleness, unselfishness, and grace are far beyond most people.

    • @danphillips8530
      @danphillips8530 4 ปีที่แล้ว +13

      Because he's a weird dude and weird dudes do weird things, the type of things a normal genius would think of as not normal.

    • @sergiocaruso1331
      @sergiocaruso1331 4 ปีที่แล้ว +3

      He's a weird dude

    • @VithalNadkarni
      @VithalNadkarni 3 ปีที่แล้ว +5

      You have a deep point: Please check out my take on Perelman's refusal, which appeared in my column on the editorial page of The Economic Times:
      Man who said `No' to Million Dollars
      Imagine walking away from a medal regarded as the maths equivalent of the Nobel Prize. If that's easy, imagine solving a hundred-year-old conundrum ranked among seven of the world's greatest mathematical problems, each worth a million dollars. Grigory Perelman, a reclusive Russian mathematician, has done it all with the nonchalance of a nishkamya yogi.
      In shocking contrast, the conduct of the Fields Medal-winner Shing-tung Yau seems to accord well with the Iron Age of Kali: the Chinese mathematician has attacked his former protégé, tried to overthrow an aging mentor in a well-publicised attempt to grab credit for solving the million-dollar problem named after the French theoretician Henri Poincare.
      Perelman's otherworldliness was on display from his student days. In 1982, the year that Yau won a Fields Medal, he earned a perfect score and a gold medal at the International Mathematics Olympiad in Budapest.
      A Russian mathematician who later became his Ph D advisor said Perelman was different: "There are a lot of students of high ability who speak before thinking," he told The New Yorker. "(Grisha) thought deeply. His answers were always correct. He always checked very, very carefully and he was not fast. Speed means nothing. Math doesn't depend on speed. It is about deep."
      In 1992, when Perelman spent a semester in American universities some of his colleagues were taken aback by his fingernails, which were several inches long. If someone asked why he didn't cut them, he would reply in a manner echoing a Taoist sage, "If they grow, why wouldn't I let them grow?"
      He went back to a job in Russia that paid him less than a hundred dollars a month. He said he'd saved enough money in the US to live on for the rest of his life.
      He seemed obsessed by the Poincare Conjecture described as a kind of 20 th century Pythagorean Theorem. But after proving it, he didn't even mention it. "I didn't worry too much myself," he said. "This was a famous problem. Some people needed time to get accustomed to the fact this was no longer a conjecture." He turned down the Fields Medal conferred on him and broke away from his profession.
      A colleague described Perelman's logic thus, "To do great work you have to have a pure mind. You can only think of mathematics. Everything else is human weakness. Accepting prizes is showing human weakness. An ideal scientist does science and cares about nothing else." ENDS

      Vithal C Nadkarni

      409 words (2014 characters without spaces, including byline)
      ...

    • @moranii1843
      @moranii1843 3 ปีที่แล้ว +43

      @@danphillips8530 What a thinker you must be

    • @drihtamnetu
      @drihtamnetu 3 ปีที่แล้ว +2

      Schrodinger, you sneaky boi

  • @daverobertson623
    @daverobertson623 3 ปีที่แล้ว +98

    So Perelman basically did the world's greatest ever hold my beer followed by an epic mic drop.
    Legend.

    • @boriskogan666
      @boriskogan666 ปีที่แล้ว +1

      he was being ripped off by the mathematicians at harvard. he's refusal to accept the prizes were designed to shine a spotlight on the inequities of academic research.

    • @Reevobxz
      @Reevobxz 8 หลายเดือนก่อน

      @@boriskogan666how can I learn more about this

  • @willchancellor6944
    @willchancellor6944 5 ปีที่แล้ว +103

    [takes drag of cigarette] "I was with a bunch of people in San Diego who were really into Ricci Flow..."

  • @navarretedf
    @navarretedf 7 ปีที่แล้ว +979

    2:15 OMG they predicted fidget spinners 3 years ago 😱

    • @tiberiu_nicolae
      @tiberiu_nicolae 6 ปีที่แล้ว +98

      David Navarrete They were mathematically inevitable

    • @msrasras
      @msrasras 6 ปีที่แล้ว +3

      Buhahaha

    • @whatno5090
      @whatno5090 6 ปีที่แล้ว +8

      They should have warned us

    • @chrisreynolds6391
      @chrisreynolds6391 5 ปีที่แล้ว +6

      Ball, donut, pretzel, fidget, fidget spinner.

    • @Violet-tb8xo
      @Violet-tb8xo 5 ปีที่แล้ว +15

      I came into the comments just looking for someone to have said this.

  • @billtruttschel
    @billtruttschel 10 ปีที่แล้ว +567

    Shouldn't we stop calling it a "conjecture" now that it has been proven?

    • @fergusmaclachlan1404
      @fergusmaclachlan1404 7 ปีที่แล้ว +193

      Yes, it should be the Poincare Theorem now.

    • @NoNamedNobody692
      @NoNamedNobody692 6 ปีที่แล้ว +114

      Not necessarily.
      Perelman only solved a very specific case of P.C.
      1. The General P..C. for the 3-Sphere still remains an open problem in Topology
      2. Same goes for the 4-Sphere
      The only reason the don’t appear to mention this is because it would be most likely too difficult to explain to individuals who aren’t mathematicians.
      Even the standard definition of the P.C. won’t make much sense outside of those individuals who have ever taken a Topology class before, and that’s usually taken around 3rd or 4th year for Mathematics majors in College during their Undergraduate years.

    • @chandrapandey822
      @chandrapandey822 6 ปีที่แล้ว +41

      SFLOVER94
      Haha true I'm studying low Dimensional Topology and yeah it's truly difficult and requires a lot of abstract thinking ( compared to say an advance course in Algebraic Geometry ) but the biggest problem for me is Shortage of time because I have to write my papers and work in my area so finding additional time to read the proof just for the sake of knowing is just not possible..

    • @NoriMori1992
      @NoriMori1992 4 ปีที่แล้ว +14

      I think when people have been calling a problem by one name for so long, they'll resist changing its name later. Besides, it wouldn't be the only problem to have an inaccurate name. Fermat's Last Theorem was called such long before it was ever proven.

    • @rifatzehra6546
      @rifatzehra6546 4 ปีที่แล้ว +2

      @@NoriMori1992 agreed

  • @jakedesnake97
    @jakedesnake97 10 ปีที่แล้ว +328

    Hey Brady, could you make a series of videos explaining every millennium problems please?

    • @nasajetpropulsionlaborator8727
      @nasajetpropulsionlaborator8727 5 ปีที่แล้ว +5

      Why, so you could talk to them at a party to seem cool?

    • @bradearlharris
      @bradearlharris 5 ปีที่แล้ว +36

      NASA JET PROPULSION LABORATORY isn’t that why numberphile has so many subs?

    • @susanaa.6692
      @susanaa.6692 4 ปีที่แล้ว +1

      Jakedesnake97 they should have taught us in school

    • @Nobody-xp6ip
      @Nobody-xp6ip 2 ปีที่แล้ว +1

      @@nasajetpropulsionlaborator8727 bruh shut the f*ck up? then why do we learn anything? who said you need to watch them? but the 300 people who liked the OP's comment do like the idea

    • @zy-fy8423
      @zy-fy8423 ปีที่แล้ว +2

      ​@@nasajetpropulsionlaborator8727 nah he is just curious chill bruh

  • @emzy1083
    @emzy1083 4 ปีที่แล้ว +79

    Perelman was my dad's classmate! From what I've been told, he's a super-nerd but is also a genius!

    • @ianleo3030
      @ianleo3030 4 ปีที่แล้ว +2

      U from Russia?

    • @emzy1083
      @emzy1083 4 ปีที่แล้ว +19

      @@ianleo3030 parents were born in st petersburg, i was born in america.

    • @stkelen9535
      @stkelen9535 2 ปีที่แล้ว +14

      @@fio123 They are 2 different Perelmans.

    • @bustofpallasathena
      @bustofpallasathena ปีที่แล้ว

      @@stkelen9535 whos th anothr 1?

    • @stkelen9535
      @stkelen9535 ปีที่แล้ว

      @@bustofpallasathena Yakov Perelman

  • @harvintoledo734
    @harvintoledo734 5 ปีที่แล้ว +13

    Poincare Conjecture is a fascinating problem because we start to make many questions about what are indicated equations to solve it. It sounds simple but there are many theorems we need to know and use to get it.

  • @JohnHobitakis
    @JohnHobitakis 10 ปีที่แล้ว +26

    Perelman is a great character in the world of mathematics, thanks for this video. The millennium questions are very captivating, I wonder how long it will take for the next one to be solved.

  • @kwstaskartas9488
    @kwstaskartas9488 10 ปีที่แล้ว +98

    Your last videos are amazing Brady ! Excellent choices.

    • @numberphile
      @numberphile  10 ปีที่แล้ว +23

      thanks

    • @MachinimaCommentary1
      @MachinimaCommentary1 10 ปีที่แล้ว +2

      Numberphile Idiot.

    • @spooky_gamer5172
      @spooky_gamer5172 7 ปีที่แล้ว

      aspenbackwoods not true first chinese 2 they are one of the reason to why he rejected, they are frauds.

    • @blackcat5771
      @blackcat5771 3 ปีที่แล้ว +2

      @@MachinimaCommentary1 why

  • @imanuelc143
    @imanuelc143 2 ปีที่แล้ว +29

    -comes
    -Solve one of the hardest math problem
    -resisting the prize
    -refuse to elaborate
    -leaves

  • @Cold_Ham_on_Rye
    @Cold_Ham_on_Rye 10 ปีที่แล้ว +28

    Thank you so much for this Brady. I love these Millenium Problems.

  • @SystemofEleven
    @SystemofEleven 9 ปีที่แล้ว +93

    The only thing I know about this particular brand of math is that a donut and a coffee mug are apparently mathematically the same thing. And this is because one of my math teachers was very creative about coming up with excuses why he had food in class, heh

    • @MattL34
      @MattL34 9 ปีที่แล้ว +12

      MsBoredom22 Yeah, a little more formally, two spaces are considered to be "equivalent" in this sense if you can come up with a "nice" continuous function between the two spaces. A sphere and a donut are not "equivalent" in this sense because a sphere has no holes and a donut has a hole. This hole causes problems which makes it impossible for there to be this sort of "nice" function between the sphere and the donut.
      Of course, this can be described very rigorously and precisely, but that's the general idea of what's going on.

    • @ganondorfchampin
      @ganondorfchampin 7 ปีที่แล้ว +13

      What topology is actually referring to is the local connections between points. Imagine you draw a circle on a sheet of paper, and you contract that circle down around a single point until it becomes a point. That circle defines what points are "adjacent" to the point. With topology, you can move points further away from each other and in different directions, but the locality is still the same: you can do the same circle contracting thing and it will collapse to the adjacent points in the same way. To add a hole though you're have to either remove points or break the connection between some, changing the locality. Imagine you have a sheet of a paper with a line running across it. You could tear a whole in the middle of the paper, but it would divide the line in half. It's not saying a donut and a coffee mug are the same thing, but that you can deform a donut shape into a coffee mug shape without changing locality, and they are said to be homeomorphic. It's similar congruence or similarity, only it's concerned with functions that preserve locality rather than distance or relative distance.

    • @billboudreaux1
      @billboudreaux1 5 ปีที่แล้ว

      lol

  • @JensenPlaysMC
    @JensenPlaysMC 6 ปีที่แล้ว +20

    Came here to understand this, although an interesting video, i would have liked to have some brief explanation of what this proof actual stated and the basic logic behind what he was trying to do

  • @benjaminbrady2385
    @benjaminbrady2385 7 ปีที่แล้ว +27

    2:17 Numberphile predicted fidget spinners before anyone else

  • @nekad2000
    @nekad2000 5 ปีที่แล้ว +40

    Most brilliance languishes in obscurity. Unfortunately, this is the world we have fostered: people with few brains a tons of ambition usually take take the credit. People like Steve Jobs fit this example perfectly.

  • @BeyondWrittenWords
    @BeyondWrittenWords 10 ปีที่แล้ว +57

    Grigori is no bs

  • @sean3533
    @sean3533 10 ปีที่แล้ว +22

    I saw a video on another channel about topology showing how a sphere could be turned inside-out following those same rules. It had a really cool animation but didn't explain very well how it was done.

  • @maxschmidt1787
    @maxschmidt1787 7 ปีที่แล้ว +7

    It amazes me that so many people watch your videos, always thought that math is not that popular.

  • @AlanKey86
    @AlanKey86 10 ปีที่แล้ว +701

    Ooh... I just remembered an orange peeling question I had once which seems vaguely relevant to this video!
    *Is it possible to peel an orange such that its skin comes off in a donut type shape (as defined around **1:45**)? That is, one continuous loop that has a hole in it.*
    I have an answer to this question - a most elegant proof. But this comment box is too small to contain it.

    • @TheRealFlenuan
      @TheRealFlenuan 10 ปีที่แล้ว +55

      No it's not; TH-cam updated the settings so that comments aren't limited in size.

    • @jaybrown6225
      @jaybrown6225 10 ปีที่แล้ว +71

      The Real Flenuan Look up Fermat's last theorem :-)

    • @TheRealFlenuan
      @TheRealFlenuan 10 ปีที่แล้ว +13

      Jay Brown I already know what it is. -.-

    • @jaybrown6225
      @jaybrown6225 10 ปีที่แล้ว +112

      The Real Flenuan OK . . . sorry if I am being dense, I took Alankey86's comment to be a humorous reference - "I have an answer to this question - a most elegant proof. But this comment box is too small to contain it." - to Fermat's note in his margin. I thought your comment about the comment box size not being limited missed his joke, but as I say, maybe your sense of humor is too subtle for me and went over my head. Anyways, I just thought Alankey86's comment was funny :-)

    • @jamesusespivot
      @jamesusespivot 10 ปีที่แล้ว +4

      I think I figured it out. May post a vid.

  • @TheFool_0
    @TheFool_0 4 ปีที่แล้ว +37

    Who's here after count dankulas video?

  • @zacharyhizon5165
    @zacharyhizon5165 7 ปีที่แล้ว +287

    2:16 what kind of fidget spinners are those

    • @TheLordoftheDarkness
      @TheLordoftheDarkness 7 ปีที่แล้ว +34

      I stopped the video to see how many likes would the person who would write a comment about fidget spinners get.

    • @batatah
      @batatah 6 ปีที่แล้ว +2

      Dark_Lord 9 I did the same thing 😂😂😂😂😂

    • @alecapin
      @alecapin 6 ปีที่แล้ว

      i just did the same :3

  • @Galbex21
    @Galbex21 4 ปีที่แล้ว +19

    I guess if you can solve the hardest mathematical problems for humanity, you really don't think too much about money or prizes.

  • @Andrew-es6yt
    @Andrew-es6yt 5 ปีที่แล้ว +24

    I speak Russian. From the few interviews on the web it becomes obvious that Perelman made very weighted and rational decision to refuse the money. Mostly because he thinks Hamilton made more for the solution. Actually, he hates when people think that he is some kind of a crazy genius. He is not.

  • @energysage9774
    @energysage9774 10 ปีที่แล้ว +59

    There's a tiny piece of misinformation in the video. When mathematicians refer to a 2-dimensional sphere they mean the same thing as the laypersons sphere which exists in 3 dimensions (because its surface is 2 dimensional, just curved). This wouldn't be an issue since it's just a matter of convention, but the distinction became important when she talked about the conjecture having been proven for 5-spheres and up. In this case she meant the mathematicians "5-sphere," (which thus exists in 6 dimensional space) which is two more dimensions than the final case which Perelman proved, and not 1 dimension higher, which is what the video implied.
    It's a curious fact that it was eventually easier to prove the higher dimensional versions of the conjecture (7 was proven before 5), but an intuitive way to understand that is that you have more "elbow room" so to speak.

    • @zoetropo1
      @zoetropo1 7 ปีที่แล้ว +3

      This is what is so interesting about the margins, when constraints and degrees of freedom are balanced in such a way that solutions either don't exist or are needles in the haystack.

    • @DavidB5501
      @DavidB5501 7 ปีที่แล้ว +3

      I don't know if it's a relevant comparison, but proving the 5-or-more-color theorem was a lot easier than the 4-color theorem!

  • @bentoth9555
    @bentoth9555 8 ปีที่แล้ว +260

    But, according to Homer Simpson, if it's a real donut then nibbles are allowed.

    • @chuffer595
      @chuffer595 8 ปีที่แล้ว +2

      I loved that book on Simpsons maths

    • @bentoth9555
      @bentoth9555 8 ปีที่แล้ว +1

      Me too. I saw Simon talking about it on one of the Numberphile videos then immediately checked my local library.

    • @SJ-to3dt
      @SJ-to3dt 8 ปีที่แล้ว

      pseudo science it is then .. =D

    • @69erthx1138
      @69erthx1138 5 ปีที่แล้ว +1

      So n-tiny Homer's approaching width 0 could make m-nibbles {m-> infinity}....hold on, "what were we talking about?"

    • @ishworshrestha3559
      @ishworshrestha3559 4 ปีที่แล้ว

      Yui

  • @dudeistpreist5721
    @dudeistpreist5721 4 ปีที่แล้ว +4

    He being a genius was treated poorly by his peers and hated people. He saw most as holding ego over the field and hated the behaviors of journalists and by extension the prizes.

  • @lukel4297
    @lukel4297 8 ปีที่แล้ว +41

    Next video: Navier-Stokes equation!

    • @binidrayoussouf385
      @binidrayoussouf385 8 ปีที่แล้ว +3

      impossible!!

    • @IoEstasCedonta
      @IoEstasCedonta 8 ปีที่แล้ว +2

      +Luke Lebel Don't rock the boat.

    • @zoetropo1
      @zoetropo1 7 ปีที่แล้ว

      binidra: How do you know?

    • @infernape716
      @infernape716 5 ปีที่แล้ว +1

      Your wish has been granted

  • @clockwerk7547
    @clockwerk7547 10 ปีที่แล้ว +603

    So... what is the Poincaré Conjecture?

    • @batterup98
      @batterup98 9 ปีที่แล้ว +6

      Tacky Yeah Don't be rude.

    • @tackyyeah8688
      @tackyyeah8688 9 ปีที่แล้ว +9

      batterup98
      I apologize if you're offended, but I was offended by what is a rather troll-type of question ... but I hope you appreciate the incredible wit that insult of mine showed ... sphere into torus by way of bullet!

    • @ktkatte6791
      @ktkatte6791 7 ปีที่แล้ว +2

      durrr - you

    • @FirstInstruMentalist
      @FirstInstruMentalist 7 ปีที่แล้ว +124

      "If you can put it in a box and close the lid, and it doesn't have any holes, than its a sphere, in any dimension"

    • @yulio3000
      @yulio3000 7 ปีที่แล้ว +48

      It can be turned into a sphere in any dimension with only stretches squeezes and morphs*
      Is what I believe is the conjecture. Not necessarily that it is a sphere, which of course is ludicrous, because we can instantly disprove that in our 3 dimensions by looking at a cube.

  • @justicewarrior9187
    @justicewarrior9187 3 ปีที่แล้ว +5

    I can't even imagine how difficult this girls course was

  • @AliHamedMoosavian
    @AliHamedMoosavian 10 ปีที่แล้ว +31

    Brady, you should make a video with Perelman himself.

  • @DevP-28
    @DevP-28 3 ปีที่แล้ว +9

    I am a undergrad student in Mathematics and I know this video dumbs down the conjecture so that we all can comprehend it easily but i would appreciate if someone provides a guided path to form a basic background in understanding Perelman's proof . Just some directions to navigate forward
    (I have basic knowledge on real analysis and calculus )

  • @jesuschrist7037
    @jesuschrist7037 5 ปีที่แล้ว +15

    0:45 There is a certain relationship between geometry and topology. Lol I always thought topology is just big daddy of geometry.

  • @darthvatrayen
    @darthvatrayen 10 ปีที่แล้ว +34

    What about a hollowed sphere? Can that be made into a solid sphere or does that count as a "hole"?

    • @blackkittyfreak
      @blackkittyfreak 6 ปีที่แล้ว +8

      If it's a hollow sphere with thickness, then in classic 2-dimensional topology it would count as two distinct surfaces rather than one, because the inside is not connected topologically to the outside. But if you're working with 3-dimensional topology it would be considered a higher-dimensional torus.

    • @maxchatterji5866
      @maxchatterji5866 6 ปีที่แล้ว

      Yes

    • @ChrisBandyJazz
      @ChrisBandyJazz 6 ปีที่แล้ว +3

      A “hollowed” sphere is just two spheres. We’re just talking about 3d objects that have a single continuous surface.

  • @warriormanhasdied6479
    @warriormanhasdied6479 4 ปีที่แล้ว +38

    who is here after count dankula.

    • @warriormanhasdied6479
      @warriormanhasdied6479 4 ปีที่แล้ว +5

      I don’t want your likes, stop rewarding me.

    • @beans2939
      @beans2939 4 ปีที่แล้ว +3

      @@warriormanhasdied6479You are disturbing me, I'm picking mushrooms

    • @mezzy238
      @mezzy238 4 ปีที่แล้ว +3

      It's your boy... RAID SHADOW LEGENDS

  • @TDansVids
    @TDansVids 8 ปีที่แล้ว +7

    I love how you have James wearing a Red Sox hat the whole video and Brady at the end wearing a Yankees hat.
    Go Blue Jays ;)

  • @analogico3615
    @analogico3615 2 ปีที่แล้ว +1

    Katie explained it so well

  • @loganmyall660
    @loganmyall660 3 ปีที่แล้ว +4

    Convinced Perelman has been working since he left the math community. the questions are; on what, and is it even finishable?

  • @tigmanshu4494
    @tigmanshu4494 2 ปีที่แล้ว +1

    Perelman.
    Solves one of the hardest problem ever.
    Refuses to take the prize money.
    Leaves.
    🗿

  • @rationalmind3567
    @rationalmind3567 5 ปีที่แล้ว +44

    this is called actual genius and not those who claim their IQ is of 100 or 200 or say they have cleared some entrance exams.

    • @membersonly807
      @membersonly807 5 ปีที่แล้ว +2

      Perelmans IQ is over 175

    • @hexa3389
      @hexa3389 5 ปีที่แล้ว +1

      @@membersonly807 I am not sure if this is true but I have heard that IQ has factors involving wealth and quality of life which ofcourse don't contribute to how smart you are.

    • @membersonly807
      @membersonly807 5 ปีที่แล้ว +4

      @@hexa3389 income and iq correlate with each other , people with higher iq earn more money on average

    • @hexa3389
      @hexa3389 5 ปีที่แล้ว +6

      @@membersonly807 but children? Do they earn money? Or what about people who live on poor countries but are smart any way?

    • @costakeith9048
      @costakeith9048 4 ปีที่แล้ว +5

      @@hexa3389 While in the typical range wealth and IQ are correlated, once you reach a certain level of IQ that correlation disappears and even reverses. At some point you become intelligent enough to realize that nothing in this material world means a damned thing.

  • @TheLlamachupacabra
    @TheLlamachupacabra 10 ปีที่แล้ว

    Please do videos on all 7 unsolved problems. Somewhere out there some 10 yr old kid is watching. yrs down the road will be one to solve them. Numberphile could influence human history! Thanks for what u do!

  • @drewmqn
    @drewmqn 4 ปีที่แล้ว +5

    π million subscribers, very satisfying.

  • @andrewsvega2023
    @andrewsvega2023 ปีที่แล้ว +1

    Well. In words of Perelman: " if the proof is correct, then no other recognition is needed."

  • @Hoodratliker
    @Hoodratliker 6 ปีที่แล้ว +27

    I bet he has solved other problems too, but since he hates attention and this gave him lots of it, he probably just destroyed the papers and kept his mouth shut.

    • @not2tired
      @not2tired 4 ปีที่แล้ว +1

      Solves 16-body Schrodinger equation... crumples script and uses it to light a Hibachi.

  • @MrVaskor
    @MrVaskor 5 ปีที่แล้ว +2

    OMG hi Katie! I finally came across your video! :)

  • @mishacol
    @mishacol 5 ปีที่แล้ว +2

    Grisha is a living genius. What a brain! I wished I could speak to him, but it is even less possible than solving another unproved conjecture.

  • @クロノシル
    @クロノシル 5 ปีที่แล้ว +10

    Perelman on why he didn't accept the prize or medal: "I'm not interested in money or fame. I don't want to be put on display like an animal in the zoo." Ironically, this has made him much more famous and "on display" than if he would have accepted the awards.

  • @subjectline
    @subjectline 3 ปีที่แล้ว +8

    I would love to know what his Mum said about the million dollars.

  • @maremaestruhiram
    @maremaestruhiram 2 ปีที่แล้ว +2

    I cannot believe I got two Millennium problems done, and this dude, whom is smarter than me, only got one. That makes me so proud of myself.

  • @inquaanate2393
    @inquaanate2393 4 ปีที่แล้ว +3

    Grigori loves the purity of maths, everything else is expedient. I hope he’s still working.

  • @MrWorshipMe
    @MrWorshipMe 9 ปีที่แล้ว +66

    I did not understand from this video what the conjecture was... just that it's premises were about a finite object with no holes like a sphere, but in any number of dimensions... what was the actual conjecture? why is this conjecture important? I really don't care about the personality or appearance of the one who proved it...

    • @Patsoawsm
      @Patsoawsm 9 ปีที่แล้ว +22

      +MrWorshipMe The conjecture is: If you have any such object, i.e. any shape you can imagine but without holes in it and not "infinitely large", then there is always a way to push it around and deform it into a sphere. The inifitely large part is simply to avoid things like an infinite plane. It certainly has no holes but you won't be able to deform it into a sphere!

    • @RosarioLeonardi
      @RosarioLeonardi 8 ปีที่แล้ว +29

      +MrWorshipMe 2:23 "If a object which don't have hole on it and it's finite then it's a sphere (or can be made into a sphere)". Seems trivial on 3d space, but mathematician needs a proof so it can made generic.

    • @lenks0
      @lenks0 8 ปีที่แล้ว +4

      +MrWorshipMe Agreed, this was more about the person who solved it and not much about the actual conjecture, difficulties, solution, applications, etc.

    • @ganondorfchampin
      @ganondorfchampin 7 ปีที่แล้ว

      I looked into it, and the sphere was actually the final case to be solved.

    • @dennisbarac1052
      @dennisbarac1052 6 ปีที่แล้ว

      @@RosarioLeonardi so maybe I understand it correctly...if I have a rope and i travel with a spaceship around a cricle..i reach the end of the rope and i try to tighten the rope...if it really gets tightened then the universe is finite? If it doesn't get tightened then the universe is infinite? Or did I miss something?

  • @-IYN-
    @-IYN- 5 ปีที่แล้ว +37

    Grigori Perelman is not a strange man. He just doesn't think like a "western" man.

    • @clockfixer5049
      @clockfixer5049 5 ปีที่แล้ว +3

      He valued ethics and conceived maths the most ethical science whose community shared high moral standards. For him time proved that he had been sorely mistaken. One of the reasons why he parted company with maths and all the rest.

    • @costakeith9048
      @costakeith9048 4 ปีที่แล้ว +2

      @Floofy shibe It's sad, but not unjustified.

  • @aarushmullick
    @aarushmullick ปีที่แล้ว +1

    Grigori Perelman you absolute genius

  • @Avaricumstudios
    @Avaricumstudios 4 ปีที่แล้ว +9

    Grigori conjecture: *why Grigori refused one million dollars*

    • @greywolf7577
      @greywolf7577 10 หลายเดือนก่อน

      Grigori refused the million dollars because he had mastered mathematics to such a degree that he could manipulate space time and create anything he desired. Thus money was worthless pieces of paper to him.

  • @DropsPoet
    @DropsPoet ปีที่แล้ว +1

    Offering numbers to a mathematician as a token is what we call practical jokes. I mean that brain can invent a machine that prints money. Perel the great

  • @zackyezek3760
    @zackyezek3760 7 ปีที่แล้ว +5

    What if I was allowed N "forbidden" operations for my topological transformations (e.g. N cuts or sphere closures)? I can imagine turning donuts into spheres with a single cut in the real world, so having a generalized topology for that kind of thing seems like it would make sense. Also, it seems like you could have classes of objects where one cannot be transformed into another even with infinitely many cuts.

  • @stt.9433
    @stt.9433 7 ปีที่แล้ว

    Reminds me of a French philosophise who was offered a nobel prize but refused for some elevated reason. A problem like that takes years to solve, he's not just some genius who had an epiphany.

  • @jaakkooksa5374
    @jaakkooksa5374 5 ปีที่แล้ว +10

    Poincaré is also famous for figuring out the field equations of General Relativity a short time before Einstein but he did not even try to take credit for that achievement because Einstein had been working on them for a decade.

  • @jebus6kryst
    @jebus6kryst 10 ปีที่แล้ว +1

    I love her Doctor Who shirt and robot necklace. The robot fits perfectly in front of the TARDIS.
    :)

  • @MetroAndroid
    @MetroAndroid 10 ปีที่แล้ว +20

    It would just be so great if every one of the Millennium Math Problems' Solvers refused the million dollar prize.

    • @nileshjambhekar7699
      @nileshjambhekar7699 9 ปีที่แล้ว +17

      I disagree respectfully. These are once in a lifetime problems that require year if not decades of dedicated work. People have to feed their families. Ideally we would pay our mathematicians better.

    • @Skidonti
      @Skidonti 9 ปีที่แล้ว +12

      Nilesh Jambhekar Yes. The amount of time and work that goes into these millennium problems would be worth far more than a million dollars if in the actual market anyway.

    • @MetroAndroid
      @MetroAndroid 9 ปีที่แล้ว +4

      The Vidlets Nah, I just think it's hilarious that he didn't take it, and it would be funny if everyone refused it. Has nothing to do with morals.

    • @___________2204
      @___________2204 9 ปีที่แล้ว

      MetroAndroid Oh.... You should have said so bro

    • @JMBBproject
      @JMBBproject 9 ปีที่แล้ว +1

      +Nilesh Jambhekar I am totally agreeing with your statement. My turbulence professor said that even for the navier stokes equation people should pay 10 million or more because not everybody knows how much work behind such theories is! It is so hard to understand and grab at some point.

  • @viewinventions5044
    @viewinventions5044 4 ปีที่แล้ว

    I Love this channel with all my heart.

  • @jacderida
    @jacderida 10 ปีที่แล้ว +3

    Another awesome video! Are there gonna be videos on all the millennium problems?

  • @MATEMATICO1O
    @MATEMATICO1O 3 หลายเดือนก่อน

    Temporal Infraction
    Developing a physical theory around the idea of "temporal infraction," where the day still has 24 hours, but the value of these hours decreases, involves a series of assumptions and extrapolations that mix theoretical physics, philosophical concepts, and the subjective perception of time. Let's explore this idea in a structured manner:
    1. Definition of Temporal Infraction
    Temporal Infraction: would be a condition or phenomenon in which, despite the objective measure of time remaining constant (i.e., a day still has 24 hours), the "quality" or "value" of this time is perceived as diminished. This reduction in the value of time could be quantified in terms of efficiency, subjective perception, or capacity for achievement within a time period.
    2. Initial Hypotheses
    Temporal Dilution Hypothesis: Propose that there is a dilution of temporal experience, where each unit of time (hour, minute) becomes less "dense" in terms of quality or utility, similar to the concept of entropy in thermodynamics, where the system tends towards a state of greater disorder.
    Subjective Compression Hypothesis: Suggest that there is a compression in the subjective perception of time, where the human brain processes time in an accelerated manner, making it seem like less time is available.
    3. Mathematical Model
    We could model time not just as a linear dimension, but as a function that depends on psychological, social, and even cosmological variables.
    If T24 represents the 24 hours of a day, we could introduce a "temporal infraction" factor I(t) that modifies the perception or value of these hours:
    T24' = T24 × I(t)
    Where I(t) is a decreasing function of time (t), representing the decrease in the perceived value of time as days pass.
    4. Physical Interpretation
    We can hypothesize that this temporal infraction is caused by external or internal interference: External Causes: A cosmological phenomenon that affects temporal perception, such as a variation in the expansion rate of the universe, which could influence how matter (including human brains) interacts with time.
    Internal Causes: A neurological or psychological change that, over time, alters how human beings process the passage of time, similar to how gravity can bend space-time in General Relativity.
    5. Experiments and Predictions
    To test this theory, we could: Measure the subjective perception of time in different populations over time, observing if there's a tendency for people to feel they have less time as they age or in different seasons of the year.
    Investigate if there's a correlation between cosmic or geophysical events and changes in temporal perception.
    Develop computational models that simulate how time perception can be affected by psychological and physical factors, adjusting the I(t) factor to predict different scenarios of temporal infraction.
    6. Conclusions and Implications
    If this theory proved true, it could have profound implications for how we understand time, both in a physical and subjective sense. It could also influence how we organize our lives, from structuring work time to valuing leisure time.
    This "Temporal Infraction" theory is an attempt to combine physical concepts with human perception of time, exploring new ways to understand how we experience and value time in our daily lives. Although still purely speculative, it offers an interesting field for future theoretical and experimentalexplorations.

  • @ianalvord3903
    @ianalvord3903 3 ปีที่แล้ว +4

    "Is any smooth, finite shape with no holes a sphere?"
    Can somebody just tell me whether it's true or false already...

  • @carolnorton2551
    @carolnorton2551 4 ปีที่แล้ว +1

    just watching this has done physical damage to my brain. Thank you

  • @yCantiLogOn
    @yCantiLogOn 10 ปีที่แล้ว +63

    I would have taken the money.

    • @jamessowin2505
      @jamessowin2505 9 ปีที่แล้ว +18

      At least take the money and give it to charity.

    • @Felixr2
      @Felixr2 6 ปีที่แล้ว +8

      Take the money and set it as a prize for another troubling conjecture.

    • @googavo1d
      @googavo1d 6 ปีที่แล้ว +1

      Nah

    • @dominicjohnmutholil
      @dominicjohnmutholil 5 ปีที่แล้ว

      @@Felixr2 Smart move.

    • @giantrunt
      @giantrunt 5 ปีที่แล้ว +5

      I would take the money and make a sphere out of it

  • @weareallbeingwatched4602
    @weareallbeingwatched4602 6 หลายเดือนก่อน

    It is about the intersectionality- id 0 = blob id 1 = blob + punchblob (-blob). By defining displacements, we can assign dimensionality of measure, and spot the difference is a bounded philospphical method which limits a posteriori experimental science methodologies. Socrates likes this.

  • @theonetrueac
    @theonetrueac 10 ปีที่แล้ว +5

    Am I the only one with audio problems on this video. All other videos seem to be fine. :-/

  • @zeynepbayram5127
    @zeynepbayram5127 8 ปีที่แล้ว +2

    you guys should do a video on the difference between rimman integral and lebesgue integral

  • @FLOABName
    @FLOABName 10 ปีที่แล้ว +27

    she's wearing a doctor who shirt.

  • @vineetasinghverma5534
    @vineetasinghverma5534 ปีที่แล้ว +1

    Yes I want to listen to Dr. GrigoriPerelman!

  • @nadivkaspi6211
    @nadivkaspi6211 7 ปีที่แล้ว +5

    2:15 its a figit spinner, 3 years ahead of its time. TRIGGERED.
    great video :D

  • @Chewligan1
    @Chewligan1 4 ปีที่แล้ว +1

    I looked at Perelman's paper - I could only recognise the full stops !!! The stuff in between was a blur !!!

  • @miweapp2692
    @miweapp2692 6 ปีที่แล้ว +5

    The 8th millennium problem by CLAY Institute: Perelman money declining

    • @ДмитроПрищепа-д3я
      @ДмитроПрищепа-д3я 5 ปีที่แล้ว

      One of the versions: taxes. The other one: he wanted to live a quite life but got huge attention and now everyone kniw where he lives. Imagine what could happen to him if he decided to take the money.

  • @barneyronnie
    @barneyronnie ปีที่แล้ว

    Grigori's eyebrows are worthy of worship!

  • @Gigatless
    @Gigatless 2 ปีที่แล้ว +5

    Anytime I feel that my coding job is too hard I go and watch some math videos and my life seems easy again

  • @cakeller98
    @cakeller98 5 ปีที่แล้ว

    who doesn't like these videos? I mean not many, but really? why??? they are so much fun.

  • @indyreilley
    @indyreilley 10 ปีที่แล้ว +3

    Math is so cool! I love the TARDIS shirt!

  • @danpondiche8844
    @danpondiche8844 3 ปีที่แล้ว +1

    Harder to solve than the Poincaré Conjecture is to find the solution to reward the one who solved it.

  • @WahranRai
    @WahranRai 5 ปีที่แล้ว +4

    Do you know that Poincaré discovered the pixel (picture element : square point) !!!

    • @WahranRai
      @WahranRai 5 ปีที่แล้ว

      who told he were the first!
      take it easy baby, and relax you are not defending your doctorat thesis..

  • @Sluggernaut
    @Sluggernaut 8 ปีที่แล้ว +1

    I thought Fermats Last Theorem had more wrong proof attempts than any other. In the words of mathematical historian Howard Eves, "Fermat's Last Theorem has the peculiar distinction of being the
    mathematical problem for which the greatest number of incorrect proofs have been published."

  • @tchtk1234567
    @tchtk1234567 7 ปีที่แล้ว +47

    anyone else notice the disguised fidget spinner at 2:12

  • @bbharim
    @bbharim 3 ปีที่แล้ว

    A 3-ball has -1 (minus one) hole. A solid circle (a 2-ball) has -1 (minus one) hole. Proof. An infinite (2D) sheet missing a solid circle has 1 hole. That solid circle is the hole, so give it -1. A -1 hole is a hole on the outside. A sphere is defined as the covering of a ball. It has one less dimension than the ball.

  • @Truetheist
    @Truetheist 9 ปีที่แล้ว +135

    I feel stupid lol

    • @YnseSchaap
      @YnseSchaap 8 ปีที่แล้ว +7

      +Truetheist Don't, this kind of mathematics is purely abstract it has no real use in the real world it's more like seeing if something can be done or not 95 % of the people will never get this kind of math myself included

    • @nose766
      @nose766 8 ปีที่แล้ว +39

      +Ynse Schaap A huge chunk of pure mathematics has applications on physics.

    • @YnseSchaap
      @YnseSchaap 8 ปีที่แล้ว +1

      Kevin U It has but how close is physics to the real world of most people I believe just as far as math, try explaining entanglement to the average joe

    • @YnseSchaap
      @YnseSchaap 8 ปีที่แล้ว

      cious li Would have done a lot for me that's for sure

    • @datojokhadze7860
      @datojokhadze7860 8 ปีที่แล้ว +1

      +Ynse Schaap well it's not exactly like that,people try to prove some of the problems,which are non-relevant,as you say,to the most of the things,but in fact,they derive new problems,which are more relevant and some day i'm pretty sure that P vs NP problem(one of the millenium problems,and the most important one,actually) will be solved and then there will be total turn over in whole science or non-science industry

  • @moracomole8090
    @moracomole8090 2 ปีที่แล้ว +1

    It took people more to acknowledge his solution than what it took him to solve it, Perelman was also treated as liar and thief by the community that's why he wanted to have nothing to do with it anymore.

  • @WaleedVcboy
    @WaleedVcboy 2 ปีที่แล้ว +3

    I love reading and gaining knowledge of maths and science all the time. The more I know, the more dangerous it gets.
    After watching this video, I asked my mate what my name is? 😂
    Great work Lad. Need to read more about this conjecture, not completely clear.

  • @RiotUnderscoreProd
    @RiotUnderscoreProd 4 ปีที่แล้ว

    Wow Katie is intelligent and beautiful. I didn't understand the concepts so much but I enjoyed the narrative.

  • @AuroraNora3
    @AuroraNora3 10 ปีที่แล้ว +21

    0:44 Heisenberg anyone?

  • @postbodzapism
    @postbodzapism 10 ปีที่แล้ว

    Another Topology video! That's amazing... more people should be interested in these stuffs!