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. More easy mathematical induction exercise

    More easy mathematical induction exercise

    28
    3
    2
  4. Gaussian integer and Fermat theorem

    Gaussian integer and Fermat theorem

    34
    6
    8
  5. Cayley's theorem and its generalization

    Cayley's theorem and its generalization

    1
  6. Group homomorphism and first group isomorphism theorem

    Group homomorphism and first group isomorphism theorem

    2
  8. Inner product space and p norm

    Inner product space and p norm

    35
    3
    3
  9. 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
  11. Mathematical induction divide exercise

    Mathematical induction divide exercise

    38
    4
    4
  13. Two ways: Integral of 1/(x^2+1)^2 from 0 to infinity

    Two ways: Integral of 1/(x^2+1)^2 from 0 to infinity

    28
    6
    1
  14. Cantor's intersection theorem Prove

    Cantor's intersection theorem Prove

    22
    3
    2
  15. Mathematical induction exercise: 6^n-1 is divisible by 5

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

    13
    2
  16. Introduction to Pythagorean quadruple

    Introduction to Pythagorean quadruple

    20
    5
    8
  17. Integral of 1/(e^x+1) and integral of 1/(e^x-1)

    Integral of 1/(e^x+1) and integral of 1/(e^x-1)

    12
    3
    5
  20. Prove normal matrix is unitary diagonalizable

    Prove normal matrix is unitary diagonalizable

    37
    4
    8
  21. sin(x+y)sin(x-y)=(sinx+siny)(sinx-siny)

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

    52
    6
    4
  22. sum of the reciprocals of the primes is divergent

    sum of the reciprocals of the primes is divergent

    33
    8
    10
  24. 7 is the only Prime followed by a Cube? What's more? how about quartic

    7 is the only Prime followed by a Cube? What's more? how about quartic

    20
    4
    6