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  1. Ring theory lecture - definition

    Ring theory lecture - definition

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  2. Counting formula in Group theory

    Counting formula in Group theory

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

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

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  5. Correspondence theorem in Group theory and third isomorphism theorem

    Correspondence theorem in Group theory and third isomorphism theorem

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  6. Volume of sphere, Cone, Pyramid

    Volume of sphere, Cone, Pyramid

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  7. How to put 20 equilateral triangles on sphere

    How to put 20 equilateral triangles on sphere

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  8. Cardano’s formula: Cubic equation

    Cardano’s formula: Cubic equation

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  11. Find eigenvalues of matrix with all same element

    Find eigenvalues of matrix with all same element

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  12. Introduction to Pythagorean quadruple

    Introduction to Pythagorean quadruple

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  14. 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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  17. Complex analysis Integral of cos(ax)/coshx from 0 to infinity

    Complex analysis Integral of cos(ax)/coshx from 0 to infinity

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  18. Integral of sec(x) and Integral of 1/sec(x)

    Integral of sec(x) and Integral of 1/sec(x)

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    14