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

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

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    28
  3. Cauchy's theorem for the abelian group, Sylow theorem for abelian group

    Cauchy's theorem for the abelian group, Sylow theorem for abelian group

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  5. Homomorphism of ring and ideal, quotient ring

    Homomorphism of ring and ideal, quotient ring

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  6. Polynomial ring over rationals

    Polynomial ring over rationals

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    5
  9. Polynomial over a commutative ring

    Polynomial over a commutative ring

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    3
    7
  12. Show e really exists in one page

    Show e really exists in one page

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    5
    7
  13. Gaussian integer and Fermat theorem

    Gaussian integer and Fermat theorem

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  14. Ring theory lecture - definition

    Ring theory lecture - definition

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  15. Counting formula in Group theory

    Counting formula in Group theory

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  16. Permutation group (Symmetric group)

    Permutation group (Symmetric group)

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

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

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  18. More easy mathematical induction exercise

    More easy mathematical induction exercise

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    2
  20. Correspondence theorem in Group theory and third isomorphism theorem

    Correspondence theorem in Group theory and third isomorphism theorem

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  21. Goldbach's theorem: Fermat numbers are coprime

    Goldbach's theorem: Fermat numbers are coprime

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  22. How to put 20 equilateral triangles on sphere

    How to put 20 equilateral triangles on sphere

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  23. Cayley's theorem and its generalization

    Cayley's theorem and its generalization

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  24. Group homomorphism and first group isomorphism theorem

    Group homomorphism and first group isomorphism theorem

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  25. 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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    118