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(Abstract Algebra 1) Definition of a Subgroup

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  • เผยแพร่เมื่อ 31 ม.ค. 2014
  • The definition of a subgroup is given, along with a few examples.

ความคิดเห็น • 43

  • @dr.dickie1418
    @dr.dickie1418 5 ปีที่แล้ว +10

    Really wish these videos did not end 5 years ago. They are very good.

  • @vigneshjothilingam7624
    @vigneshjothilingam7624 6 ปีที่แล้ว +17

    Wow what a explanation... you are also the one that make me love math

  • @jpdemont
    @jpdemont 7 ปีที่แล้ว +4

    There are quite a few playlists on TH-cam devoted to Modern Algebra but this is the best. Thank you so much for making and sharing this.

  • @Jkfgjfgjfkjg
    @Jkfgjfgjfkjg 9 ปีที่แล้ว +15

    Great videos. I just wish you could produce new videos as fast as my Abstract Algebra course moves...
    Thank you

  • @samchau3476
    @samchau3476 4 ปีที่แล้ว +5

    Please make abstract videos on Isomorphisms, Rings and Integral Domains. And more videos on how to get hold of one's intuition for making proofs. Most students suck at proofs and profs seem to think we should be able to do this shit or run after them all day

  • @juanjaimescontreras1798
    @juanjaimescontreras1798 4 ปีที่แล้ว +5

    Not sure if my professor would accept a verbal “ yes it is associative “.

  • @soklylorn7665
    @soklylorn7665 ปีที่แล้ว +1

    These videos are so helpful.
    Thank you very much.

  • @dipankardutta7823
    @dipankardutta7823 8 ปีที่แล้ว +2

    it was clear , dats y attractive n not boring . well done .

  • @jacklinesalome3753
    @jacklinesalome3753 ปีที่แล้ว

    You make me understand this course

  • @Mannu_81
    @Mannu_81 3 ปีที่แล้ว

    Your explanation and your voice both are fabulous.

  • @milliekim5072
    @milliekim5072 4 ปีที่แล้ว

    Thank you so much, sir!

  • @malcolmlamya8770
    @malcolmlamya8770 11 หลายเดือนก่อน

    Really good, ❤️🙏

  • @bigboss2998
    @bigboss2998 7 ปีที่แล้ว

    thank you this was very helpful

  • @nugusujemal2317
    @nugusujemal2317 7 หลายเดือนก่อน

    THANKYOU SO MUCH!!

  • @xiaoboyali7906
    @xiaoboyali7906 7 ปีที่แล้ว

    It is really helpful!

  • @michaelturkson3693
    @michaelturkson3693 2 ปีที่แล้ว

    very very inspiring. thank you so much Sir

  • @karthikaa2411
    @karthikaa2411 7 ปีที่แล้ว +1

    So clear and interesting. I just wish you could produce new videos Abstract Algebra.

    • @learnifyable
      @learnifyable  7 ปีที่แล้ว

      I do plan on making more. I just wish I had some more free time!

  • @hamzarana7805
    @hamzarana7805 7 ปีที่แล้ว

    Very helpful......thanks

  • @diribaaboma8341
    @diribaaboma8341 3 ปีที่แล้ว

    Thank you so much.

  • @vismayanm2399
    @vismayanm2399 ปีที่แล้ว

    It is an really useful video.... thankyou sir 😊

  • @ardrajithendran9303
    @ardrajithendran9303 2 ปีที่แล้ว

    Thank you ❤️

  • @cavelinguam6444
    @cavelinguam6444 3 ปีที่แล้ว

    Awesome

  • @eslamababneh7094
    @eslamababneh7094 3 ปีที่แล้ว

    Great . Can you make videos about binary operations .please

  • @11hitmanDagenius
    @11hitmanDagenius 8 ปีที่แล้ว +5

    So clear and interesting ! thanks a lot for such videos !
    Group theory has lot of applications right?
    I noticed it has lot of importance in other areas of mathematics . For example, there is an elegant proof of Fermat's Little theorem using abstract algebra !

    • @learnifyable
      @learnifyable  8 ปีที่แล้ว +2

      +Devesh Sawant Yes! It also has applications in physics (Lie groups) and chemistry (point groups).

  • @iaktech
    @iaktech 10 ปีที่แล้ว +1

    Great! Keep Making Such Videos!

    • @learnifyable
      @learnifyable  10 ปีที่แล้ว +3

      I definitely plan on making more. I'm glad to hear that you enjoy them!

  • @retamililu
    @retamililu ปีที่แล้ว

    Mr. learnifyable thank you very much , but how we can get this book or pdf

  • @ivankristoffergamilla5948
    @ivankristoffergamilla5948 ปีที่แล้ว

    In 8:25 why is it groups when you cannot have inverse of 2 it should have a value of -2 right to satisfy the inverse property?

  • @Love_Hope_from_Above
    @Love_Hope_from_Above 10 ปีที่แล้ว +4

    Mr. Learnifyable:
    Another fine video on subgroups. I really like the examples and your teaching style is easy to understand. Will you be producing videos on cyclic groups, generators of a group/subgroup, cosets, permutation groups, etc. in the near future?
    You are a marvelous communicator!
    > Benny Lo
    California
    2-17-2014

    • @learnifyable
      @learnifyable  10 ปีที่แล้ว +4

      Yes, I certainly would like to make more videos. All of the topics that you mentioned are things I would like to cover.

  • @nossonweissman
    @nossonweissman 5 ปีที่แล้ว

    Question:
    How would I prove that for H1 != G and H2 != G, that H1 is not contained in H2?

    • @raybroomall8383
      @raybroomall8383 5 ปีที่แล้ว

      Without a definition of the operator != it is not clear what you mean, further if H1!=G then every element in G is in H! regardless of the operator !=.
      If H2!=G then every element in G is in H2!, therefore H1!=H2!. State that H1! = G and there n elements ksub 1 through ksub n-1 in G are in H1! therefore H1! is a proper subset of G. State that H2! = G and there n elements ksub 1 through ksub n-1 in G are in H2! so H2! is a proper subset of G
      state that e the identity element is in both H1! and H2!. So if there is an element in H2! that is not in H1! then there is some element r in H2! where e ! r is not in H1! k. But we said H1! =G then r is not in G and likewise cannot be in G because as we stated H2!=G So H1!=G=H2! ...qed

  • @tayyabazeb9270
    @tayyabazeb9270 3 ปีที่แล้ว

    Plz how to prove that S4/V4 is isomorphic to s3

  • @revanthreddy3790
    @revanthreddy3790 3 ปีที่แล้ว

    At 7:54 what is it ? Four mod four is zero,I didn't get it.. could you please explain it more clearly 🌝

    • @davidnaray8398
      @davidnaray8398 3 ปีที่แล้ว

      The answer to mod is the remainder
      So 5/4 is 1 and 1 remainder, so 5 mod4 is 1
      Because 4/4 is 1, being evenly divided, it has remainder 0
      As such, 4mod4 is 0

  • @rajeswaripadari8543
    @rajeswaripadari8543 4 ปีที่แล้ว

    Please prove associative property

  • @mohammedalzaben7206
    @mohammedalzaben7206 3 ปีที่แล้ว

    this is one of those vids where you have to play it in x1.75 .....

  • @rikkiflows3867
    @rikkiflows3867 2 ปีที่แล้ว

    "not just the identity"
    So u mean, no trivial subgroups are including the identity?
    Sorry I just confused... I hope u noticed

    • @rikkiflows3867
      @rikkiflows3867 2 ปีที่แล้ว

      I mean non trivial proper subgroups

  • @kniinortey31
    @kniinortey31 4 ปีที่แล้ว

    You don't prove anything.
    This is indeed associative without a prove.