2. Homomorphism of ring and ideal, quotient ring

    Homomorphism of ring and ideal, quotient ring

    20
    3
    7
  4. Polynomial ring over rationals

    Polynomial ring over rationals

    21
    4
    5
  7. Polynomial over a commutative ring

    Polynomial over a commutative ring

    23
    3
    7
  8. Prove Method of infinite Descent (Vieta's jumping) : (x^2+y^2+1)/xy=3

    Prove Method of infinite Descent (Vieta's jumping) : (x^2+y^2+1)/xy=3

    56
    4
    9
  9. Differential equation

    Differential equation

    6
    1
  10. How to put 20 equilateral triangles on sphere

    How to put 20 equilateral triangles on sphere

    25
    4
    17
  11. Show e really exists in one page

    Show e really exists in one page

    21
    5
    7
  12. Mathematical induction middle level exercise

    Mathematical induction middle level exercise

    21
    5
    2
  13. Correspondence theorem in Group theory and third isomorphism theorem

    Correspondence theorem in Group theory and third isomorphism theorem

    22
    3
    26
  14. Field theory (Abstract Algebra)

    Field theory (Abstract Algebra)

    22
    4
    59
  16. Permutation group (Symmetric group)

    Permutation group (Symmetric group)

    17
    1
    2
  17. Ring theory lecture - definition

    Ring theory lecture - definition

    19
    2
    11
  18. Counting formula in Group theory

    Counting formula in Group theory

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

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

    35
    4
    14
  20. More easy mathematical induction exercise

    More easy mathematical induction exercise

    28
    3
    2
  21. Linear algebra advanced basic: Zorn's lemma, exchange lemma, dimension

    Linear algebra advanced basic: Zorn's lemma, exchange lemma, dimension

    29
    6
    57
  22. Hermitian matrix is diagonalizable and orthonormal basis

    Hermitian matrix is diagonalizable and orthonormal basis

    31
    6
    21
  23. Goldbach's theorem: Fermat numbers are coprime

    Goldbach's theorem: Fermat numbers are coprime

    38
    5
    12
  24. the field of quotients of an integral domain

    the field of quotients of an integral domain

    35
    6
    16