Lecture 9: regular expression in automata ,how to make RE, examples, power, concatenation, Union
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- เผยแพร่เมื่อ 5 ก.พ. 2025
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By: Ali Hassan Soomro
Facebook: AliiHassanSoomro
Gmail: alisoomro666@gmail.com
Kindly Note Please !
Example: string contains any a or any b
L={^,a,b,aa,ab,ba,bb,aaa,aab,….}
R=(a+b)*
what is difference between (ab)* and (a)*(b)*
Thank you sir.... I m searching for solution of( a+b)*
Programalogy
Kia (a+b)* ke case mein "a" as single alphabet bhe use hosakta hai aur as a string bhe use hosakta hai,without alphabet "b"?
Yppp
@@zartashiamehreen7881 (ab)* means both a and b will occur joined in that way, a*b* means 'a' occurring any times followed by 'b' occuring any times.
Sir apka smjhany ka trika itna hi acha hai jinti ye automata mushkil hai...ap nhi janty apk lectures ki wja sy meri kitni bri tension khtm ho gae hai..mjy ye subject smjh hi nhi aa rha tha kisi trha sy.... Thank you soo much sir...Alla apko dunia o akhrat mai aala kamyaabion sy nwazy....aamen
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Ameen
Actually mujhy bhi es subject ki smjh ni a ri thi....
Shukr h allah pak ka k mujhy sir k dye gay lectures ki smjh a gai. Bht acha smjhaty hn. Allah pak ap ko es ka ajar dn gy. In sha Allah. Jzak Allah
shukr h "ALLAH" Pak ka, kindly ALLAH ka naam hamesha bara likha karen, and thank you ky apko mere videos pasand aey :-) Share it with your friends
@@Programology IN SHA ALLAH. I will be careful next time.
Thank you sir,
l have seen all the lectures now i understand what is Automata .. God bless you sir !
Glad to hear that, share it with your classmates
Allah apko iska ajar dey bhai , aap behtreen prha rhey hein
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Best channel i ever found on youtube i proud to subscribe you what a great teacher you are
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Best channel. God bless you
Good content! Easy to understand!!
Masha Allah. Very Clear and Succinct. Best Lectures on Theory of Automata. LOVE YOU
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am from KFUEIT
bro really impressed from your videos
Glad to hear that
Thank u sir ap se me na pora Semester ki Tiyari kr li 1 din me
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Outstanding lect kindly upload next lect .
Thank you, Yes I will upload next lecture very soon, if you like it , share it with your friends
Awsome, u so perfect in automata
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You are a good teacher
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very helpful thank u sir
its helpfull
Osmmm really its help me so.much ....
thank you kiara
Thanks Sir for Best lecture
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@@Programology ok Sir
Best lecture 👌
excellent sir ,u did well compare to VU lectrus, i just got it . thanks
Thanks a ton, please share these videos with your friends too
outstanding sir
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Amazing ❤
. Develop a regular expression for the following language over the alphabet P = {a, b} such that it accepts all strings in which the letter b is never tripled. This means that no word contains the substring bbb.
plz mjy yeh question solve kr dain
Shukr Alhamdullilah
:-D
Sir u r great in automata subject...
Plz upload videos on all chapters..
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great sir. Understood
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Helpful videos
Very nice sir
Thank you :-) share it with your friends
roz 1 lecture please
Semester k bad InshAllah
good yr samaj mn agya
Thank you
Well come
Helpful lectues.
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Sir, it would be more helpful for us if u add next chapter
Yes very soon
Thanks a lot...Nicely Done
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Good Explanation
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Thank you for this
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May Allah bless uhh sir
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I have a question
In the example
L={ a,ab,abb,abbb,...}
The regular expression should be
R.E=ab+ not ab* because it does not contain null
right
Roz 1 lecture kr dia kry sir
Jee
😆😆ham roz aik lecture smj nahi pate kitabe dek dek ke ye bichara kese upload kre. Sbr hojae ga
@@adilshafiq2976 sabr krny k din gaye kr dia ha next lecture upload ap kuch dino k bad dekhna sabr sy
@@madihamukhtar2522 😆😆😆😆 suba paper he 😂😂😂. Automata.. bss revision kr raha ta.
@@adilshafiq2976 ok 👍
Well explained
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last question mn union ki jaga concat hoga kun k statement mn and hai or nahi. Am I correct?
so smooth explanation thank you sir
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Thank you so much, Sir
Share it with your friends :-)
sir thank u so much
I want to lestien your lecture every lecture
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Good video sir, and please send me ppt file of that lecture
Helpful
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thank you teacher
Sir Plz upload more lectures mera new semester start hua h and i have to study this subject so plz can you complete this course within 3 months?
Jee Zarur
Ni kry gy
@@madihamukhtar2522 😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂
yr ye Daniel I cohen book ky chap 4 ky Regular expression ky problems solve py aik video upload krdo yr
Yes very soon
sir plz upload next lec finite automata
Yes
@@Programology sir in ki hi sun lyen plzzzz kr dyen
when will u upload new lectr ? m waitng..
very soon
Sir lecture 10 b kr dy
Jee zarur
Thank You Sir, You are doing amazing job
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Thanks You.
Thank you :-) share it with your friends
Thanks sir love you
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Sir more videos about regular expression
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sir plzzz more videos
Yes
Sir contex free grammar pe bee eik video bano
Ji
Can both a and b included in or sign
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Can any one answer this please...?
Construct a regular expression defining each of the following languages over the alphabet sigma={a,b}:
1). all words ends in 3 consecutive b.
2). all words heaving atleast 1 a.
Thanks...
All words ends in 3 consecutive b
(a+b)*bbb
All words having at least one ‘a’
(a + b)* a (a + b)*
@@Programology Thanks.
Kindly answer the one more question. Which I will post tomorrow.
Regards.....
@@Programology Sir can we write b power 3 i.e. (a+b)*b3
Sir ap ki awaaz boht kmmm h?
han srf is lecture me kum he, handsfree use kreky sune, baqi videos me sahi hy, I'm sorry for this
can u give us a link to practice? Any site or Book...
Watch lecture for Exam Preparation Material
L={ thanks a lot sir }
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Allah ka wasta ab to next lecture kr dyen 🙏
hahah Jee Jee karta hun
@@Programology sir time btayen ap kb kry gy?
Sir bohat tention me dala hua ha ap ny q k lecture bohat achy sy smj a jata ha or ap itna wait krwaty ho kisi or ki smj b ni ati kya kry?
Men is week me kafi upload kardun ga
@@Programology ok sir
Please give some questions or example for solution
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Thanks sir
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cleared My Piont
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The language of all words that has at least 2 a's ...sir iska regular expression kaisa hoga
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thankyou sir
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kindly upload next lectures
Yes
new lecture ?
Sir lecture 10 kr dy ab
Jee zarur
Sr ab to kr dy next lecture itny din ho gy 22 Feb ko exam ha hmara
Share it with your friends, itny views hi naahi aty tbi slow upload krta hun is series ky videos
@@Programology sir sorry to say agr view ni ha to is me hmara kya kasoor or exames hi ho jaye ga jb to phir to sb friends b ni dekhy gy lectures q k hmy koi faida hi ni hoga exams ho Chuka hoga hmara
ab rulao gi kiya? Khair this time I will try to upload next lectures sooner than I say actually.
@@Programology hmmm ok
Thank you sir itna kehny k bawajood b ap ny lecture upload ni kia thanx again
next video plz
Yes
Next lecture kb uplod krin ge🙄
buht jald
Paprz k bad karin ge ?😭😭
🙄🙄🙄🙄🙄🙄🙄🙄🙄@@Programology
Please solve and reply in comments:
Q. Give regular expression of following language on sigma={a,b}
Q1. All strings containing exactly 2 a's.
Q2. All strings starting and ending with different letters.
Q3. All strings in which clumps of a's have length that multiple of 3.
In three questions k ap ne RE likhna ha .
I am waiting and would be thankful to you.
Question 2
a(a+b)*b+b(a+b)*a
aab*+b*aa q2
Sir can u plz share some more example for RE, plzzz
yes
@@Programology thank u very much .
awaz bohat
zayada loud ha
sir kindly speaking volume increase
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awaz ka masla h lgta apki ..
Gg miss's farrukh
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Sir kr dyen ab to !!!
Jee
Can any one explain this R.E [(ab+ba)(aa+bb)*(ab+ba)]* ?
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100th Comment
thank you 100th times
❤❤❤❤❤❤❤❤❤❤❤
O sir jeee pubg kab kele ge pir 😁😁😁
haha
7:23
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Gg
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How to write a regex of the following conditions?
A password which should always have
1. At least one odd number but not consecutive (e.g 1,3,5,7,9).
2. At least one capital letter but not consecutive (e.g one capital letter is not followed by another capital letter).
3. At least one small letter but not consecutive (e.g one small letter is not followed by another small letter).
4. It contains special characters that might be repeated (e.g !@#$%^&*).
Kindly help.
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poorest sound quality , very low voice
Sir ya lecture bhut acha say smajh agya h but mnya Kuch concept clear krnya hn pl kasa ap say contact kr kaya apny query ko solved krya pl
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Thank you for your service 🐕🦺
very nice sir
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Helpful
Sir
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bro ap is ka jawab de skte hu ??
dear koi please guide kra Sir na pehla kaha k null (lamda) hu ga tu * use hu ga or jub null ni hu ga tu + use hu ga but Sir na E#3 ma R= ab* dali h tu yaha ab power + ni bnti ??
Thanks a lot sir
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