All Videos Channels
  1. Prove Method of infinite Descent (Vieta's jumping) : (a^2+b^2)/(ab+1) is square, imo1988

    Prove Method of infinite Descent (Vieta's jumping) : (a^2+b^2)/(ab+1) is square, imo1988

    14
    4
  2. Normal subgroup and quotient subgroup

    Normal subgroup and quotient subgroup

    20
    5
  3. There exist distinct integers x,y,z for which, x^2+y^2+z^2=14^n

    There exist distinct integers x,y,z for which, x^2+y^2+z^2=14^n

    21
    4
    1
  4. zero morphism and kernel and cokernel

    zero morphism and kernel and cokernel

    12
    1
  6. Schrodinger equation and Klein Gordan equation continuity equation

    Schrodinger equation and Klein Gordan equation continuity equation

    33
    2
    7
  7. Cauchy's theorem for the abelian group, Sylow theorem for abelian group

    Cauchy's theorem for the abelian group, Sylow theorem for abelian group

    22
    5
    6
  9. Homomorphism of ring and ideal, quotient ring

    Homomorphism of ring and ideal, quotient ring

    20
    3
    7
  12. Show e really exists in one page

    Show e really exists in one page

    21
    5
    7
  13. Ring theory lecture - definition

    Ring theory lecture - definition

    19
    2
    11
  14. Counting formula in Group theory

    Counting formula in Group theory

    35
    7
    15
  15. Construction in categories: product/coproduct, equalizer/coequalizer, Pushout/pullbacks

    Construction in categories: product/coproduct, equalizer/coequalizer, Pushout/pullbacks

    35
    4
    14
  17. Correspondence theorem in Group theory and third isomorphism theorem

    Correspondence theorem in Group theory and third isomorphism theorem

    22
    3
    30
  18. How to put 20 equilateral triangles on sphere

    How to put 20 equilateral triangles on sphere

    25
    4
    17
  19. a_{n+2}=5a_{n+1}-6a_{n} Mathematical induction

    a_{n+2}=5a_{n+1}-6a_{n} Mathematical induction

    22
    4
    7
  20. Special quartic equation and cos72

    Special quartic equation and cos72

    34
    4
    12
  21. More easy mathematical induction exercise

    More easy mathematical induction exercise

    28
    3
    4
  22. the field of quotients of an integral domain

    the field of quotients of an integral domain

    35
    6
    25
  23. Mathematical induction middle level exercise

    Mathematical induction middle level exercise

    21
    5
    7
  24. Linear map fixed point theorem

    Linear map fixed point theorem

    43
    2
    14