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  1. Solve advanced linear equations - IXL A1.J.5 (28N)

    Solve advanced linear equations - IXL A1.J.5 (28N)

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    1
    14
  2. Solving Systems. Addition method. Advanced.

    Solving Systems. Addition method. Advanced.

    1
  3. Cardano’s formula: Cubic equation

    Cardano’s formula: Cubic equation

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

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

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    6
    57
  6. Linear map fixed point theorem

    Linear map fixed point theorem

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    2
    7
  8. integral of x^n lnx from 0 to 1

    integral of x^n lnx from 0 to 1

    35
    7
    7
  9. integral of lnx ln(1-x) from 0 to 1

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

    36
    6
    11
  10. The existence proof of eigenvectors and eigenvalues

    The existence proof of eigenvectors and eigenvalues

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    2
    2
  11. 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)

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    3
    17
  12. Integral of 1/(1+x^2)^2 (substitution)

    Integral of 1/(1+x^2)^2 (substitution)

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    3
    1
  13. Very funny math question solve x for x^x^n=n

    Very funny math question solve x for x^x^n=n

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    3
  15. Prove Method of infinite Descent : square 2 is irrational

    Prove Method of infinite Descent : square 2 is irrational

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    4
    2
  16. Prove Method of infinite Descent : no nontrivial solutions x^2+y^2=3z^2

    Prove Method of infinite Descent : no nontrivial solutions x^2+y^2=3z^2

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    2
    1
  17. Prove Method of infinite Descent (Vieta's jumping) : (4a^2-1)^2/(4ab-1) is integer, then a=b

    Prove Method of infinite Descent (Vieta's jumping) : (4a^2-1)^2/(4ab-1) is integer, then a=b

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    4
  18. Prove Method of infinite Descent : square k is irrational if k is not square free

    Prove Method of infinite Descent : square k is irrational if k is not square free

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    4
    2
  19. 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

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    2
    1
  20. 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

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    4
  21. Normal subgroup and quotient subgroup

    Normal subgroup and quotient subgroup

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  22. 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

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    4
    1
  23. Plot Mcdonald Shape by function

    Plot Mcdonald Shape by function

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

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

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    4
    6
  25. zero morphism and kernel and cokernel

    zero morphism and kernel and cokernel

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    1