(Abstract Algebra 1) Definition of a Subgroup

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  • Опубликовано: 15 дек 2024
  • The definition of a subgroup is given, along with a few examples.

Комментарии • 44

  • @dr.dickie1418
    @dr.dickie1418 5 лет назад +10

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

  • @jpdemont
    @jpdemont 7 лет назад +4

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

  • @vigneshjothilingam7624
    @vigneshjothilingam7624 7 лет назад +17

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

  • @Jkfgjfgjfkjg
    @Jkfgjfgjfkjg 10 лет назад +15

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

  • @soklylorn7665
    @soklylorn7665 2 года назад +1

    These videos are so helpful.
    Thank you very much.

  • @samchau3476
    @samchau3476 5 лет назад +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

  • @Mannu_81
    @Mannu_81 3 года назад

    Your explanation and your voice both are fabulous.

  • @karthikaa2411
    @karthikaa2411 7 лет назад +1

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

    • @learnifyable
      @learnifyable  7 лет назад

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

  • @juanjaimescontreras1798
    @juanjaimescontreras1798 5 лет назад +5

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

  • @dipankardutta7823
    @dipankardutta7823 9 лет назад +2

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

  • @ivankristoffergamilla5948
    @ivankristoffergamilla5948 2 года назад

    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?

  • @vismayanm2399
    @vismayanm2399 2 года назад

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

  • @retamililu
    @retamililu Год назад

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

  • @11hitmanDagenius
    @11hitmanDagenius 9 лет назад +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  9 лет назад +2

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

  • @michaelturkson3693
    @michaelturkson3693 2 года назад

    very very inspiring. thank you so much Sir

  • @revanthreddy3790
    @revanthreddy3790 3 года назад

    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 года назад

      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

  • @jacklinesalome3753
    @jacklinesalome3753 Год назад

    You make me understand this course

  • @eslamababneh7094
    @eslamababneh7094 4 года назад

    Great . Can you make videos about binary operations .please

  • @tayyabazeb9270
    @tayyabazeb9270 3 года назад

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

  • @malcolmlamya8770
    @malcolmlamya8770 Год назад

    Really good, ❤️🙏

  • @rajeswaripadari8543
    @rajeswaripadari8543 4 года назад

    Please prove associative property

  • @nugusujemal2317
    @nugusujemal2317 11 месяцев назад

    THANKYOU SO MUCH!!

  • @ardrajithendran9303
    @ardrajithendran9303 2 года назад

    Thank you ❤️

  • @valeriereid2337
    @valeriereid2337 2 месяца назад

    Thank you so very much

  • @iaktech
    @iaktech 10 лет назад +1

    Great! Keep Making Such Videos!

    • @learnifyable
      @learnifyable  10 лет назад +3

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

  • @nossonweissman
    @nossonweissman 5 лет назад

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

    • @raybroomall8383
      @raybroomall8383 5 лет назад

      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

  • @milliekim5072
    @milliekim5072 4 года назад

    Thank you so much, sir!

  • @hamzarana7805
    @hamzarana7805 7 лет назад

    Very helpful......thanks

  • @diribaaboma8341
    @diribaaboma8341 3 года назад

    Thank you so much.

  • @xiaoboyali7906
    @xiaoboyali7906 8 лет назад

    It is really helpful!

  • @Love_Hope_from_Above
    @Love_Hope_from_Above 10 лет назад +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 лет назад +4

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

  • @rikkiflows3867
    @rikkiflows3867 3 года назад

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

  • @bigboss2998
    @bigboss2998 8 лет назад

    thank you this was very helpful

  • @cavelinguam6444
    @cavelinguam6444 3 года назад

    Awesome

  • @mohammedalzaben7206
    @mohammedalzaben7206 3 года назад

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

  • @kniinortey31
    @kniinortey31 4 года назад

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