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  3. Polynomial over a commutative ring

    Polynomial over a commutative ring

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  7. Show e really exists in one page

    Show e really exists in one page

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  8. Gaussian integer and Fermat theorem

    Gaussian integer and Fermat theorem

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  9. Ring theory lecture - definition

    Ring theory lecture - definition

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  10. Counting formula in Group theory

    Counting formula in Group theory

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

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

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  13. 黎曼猜想 What is Riemann hypothesis (14): Higher L function

    黎曼猜想 What is Riemann hypothesis (14): Higher L function

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  14. Correspondence theorem in Group theory and third isomorphism theorem

    Correspondence theorem in Group theory and third isomorphism theorem

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  15. Volume of sphere, Cone, Pyramid

    Volume of sphere, Cone, Pyramid

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    1
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  16. How to put 20 equilateral triangles on sphere

    How to put 20 equilateral triangles on sphere

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  17. Cardano’s formula: Cubic equation

    Cardano’s formula: Cubic equation

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    2
  19. Email Expert AI Demo: advanced “Generative AI” that delivers verified, targeted leads instantly

    Email Expert AI Demo: advanced “Generative AI” that delivers verified, targeted leads instantly

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  20. sum of the reciprocals of the primes is divergent

    sum of the reciprocals of the primes is divergent

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  21. Find eigenvalues of matrix with all same element

    Find eigenvalues of matrix with all same element

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  22. Introduction to Pythagorean quadruple

    Introduction to Pythagorean quadruple

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  23. 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

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  24. integral of t^{z-1}/(e^z-1) from 0 to infinity

    integral of t^{z-1}/(e^z-1) from 0 to infinity

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