1. Permutation group (Symmetric group)

    Permutation group (Symmetric group)

    17
    1
    2
  2. Construction in categories: product/coproduct, equalizer/coequalizer, Pushout/pullbacks

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

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

    Correspondence theorem in Group theory and third isomorphism theorem

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

    How to put 20 equilateral triangles on sphere

    25
    4
    17
  5. sinx+sin2x+sin3x+...+sin nx, cosx+cos2x+cos3x+cos 4 x+...+cos nx

    sinx+sin2x+sin3x+...+sin nx, cosx+cos2x+cos3x+cos 4 x+...+cos nx

    16
    2
    8
  6. Integral of e^ax cos(bx) and Integral of e^ax sin(bx) no integration by part

    Integral of e^ax cos(bx) and Integral of e^ax sin(bx) no integration by part

    22
    3
    177
  7. Integral of 1/(x^3-1) from integral of 1/(x^3+1)

    Integral of 1/(x^3-1) from integral of 1/(x^3+1)

    24
    3
    21
  8. Integral of 1/(x^2+1) by using complex number

    Integral of 1/(x^2+1) by using complex number

    28
    4
    30
  9. Cayley's theorem and its generalization

    Cayley's theorem and its generalization

    1
  10. Group homomorphism and first group isomorphism theorem

    Group homomorphism and first group isomorphism theorem

    2
  11. integral of lnx ln(1-x) from 0 to 1

    integral of lnx ln(1-x) from 0 to 1

    36
    6
    25
  12. integral of x^n lnx from 0 to 1

    integral of x^n lnx from 0 to 1

    35
    7
    18
  13. Hermitian matrix is diagonalizable and orthonormal basis

    Hermitian matrix is diagonalizable and orthonormal basis

    31
    6
    25
  14. Goldbach's theorem: Fermat numbers are coprime

    Goldbach's theorem: Fermat numbers are coprime

    38
    5
    13
  15. Inner product space and p norm

    Inner product space and p norm

    35
    3
    3
  16. Probability solution: A Total of n balls, number of 1 through n...

    Probability solution: A Total of n balls, number of 1 through n...

    40
    5
    17
  17. sin(x+y)sin(x-y)=(sinx+siny)(sinx-siny)

    sin(x+y)sin(x-y)=(sinx+siny)(sinx-siny)

    52
    6
    4
  18. Mathematical induction exercise: 6^n-1 is divisible by 5

    Mathematical induction exercise: 6^n-1 is divisible by 5

    13
    2
    2
  19. Cantor's intersection theorem Prove

    Cantor's intersection theorem Prove

    22
    3
    2
  20. Prove normal matrix is unitary diagonalizable

    Prove normal matrix is unitary diagonalizable

    37
    4
    8
  21. Volume of sphere, Cone, Pyramid

    Volume of sphere, Cone, Pyramid

    8
    1
    15