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  2. Special quartic equation and cos72

    Special quartic equation and cos72

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    12
  3. 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)

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    3
    36
  5. More easy mathematical induction exercise

    More easy mathematical induction exercise

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    3
    4
  6. Integrals via u substitution of trigonometric functions (Jae Academy)

    Integrals via u substitution of trigonometric functions (Jae Academy)

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    1
  7. 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

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    3
    419
  8. Permutation group (Symmetric group)

    Permutation group (Symmetric group)

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    12
  10. 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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    1
  12. the field of quotients of an integral domain

    the field of quotients of an integral domain

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

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

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    63
  14. Prove Method of infinite Descent : square 2 is irrational

    Prove Method of infinite Descent : square 2 is irrational

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    4
    2
  15. Construction in categories: product/coproduct, equalizer/coequalizer, Pushout/pullbacks

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

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    4
    14
  16. Gaussian integer and Fermat theorem

    Gaussian integer and Fermat theorem

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    12
  17. Counting formula in Group theory

    Counting formula in Group theory

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    7
    15
  18. Polynomial over a commutative ring

    Polynomial over a commutative ring

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    7
  20. a_{n+2}=5a_{n+1}-6a_{n} Mathematical induction

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

    22
    4
    7
  21. Field theory (Abstract Algebra)

    Field theory (Abstract Algebra)

    22
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    67
  22. 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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  23. Integral of 1/(1+x^2)^2 (substitution)

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

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  24. 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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  25. Mathematical induction middle level exercise

    Mathematical induction middle level exercise

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