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  1. Simple Group of order 60 must be A5

    Simple Group of order 60 must be A5

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    5
  3. zeta function at zero, at 1, at 3, particular values

    zeta function at zero, at 1, at 3, particular values

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    6
    2
  4. Factorize a^3 + b^3 + c^3 - 3abc

    Factorize a^3 + b^3 + c^3 - 3abc

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    2
    1
  5. Nested radical 2: Nested radical of Ramanujan

    Nested radical 2: Nested radical of Ramanujan

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    8
    1
  6. Nested radical1: Nested radical of Ramanujan

    Nested radical1: Nested radical of Ramanujan

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    4
    2
  8. Prove Method of infinite Descent : square 2 is irrational

    Prove Method of infinite Descent : square 2 is irrational

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    4
    2
  9. Cantor's intersection theorem Prove

    Cantor's intersection theorem Prove

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  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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    2
    1
  11. 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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  12. 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
  13. 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
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  14. 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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  15. Normal subgroup and quotient subgroup

    Normal subgroup and quotient subgroup

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  16. 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
  17. Plot Mcdonald Shape by function

    Plot Mcdonald Shape by function

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  18. zero morphism and kernel and cokernel

    zero morphism and kernel and cokernel

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  20. Microsoft Surface Book: Hands-on review

    Microsoft Surface Book: Hands-on review

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  21. Lecture 27, part 1

    Lecture 27, part 1

    159