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  2. Polynomial ring over rationals

    Polynomial ring over rationals

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    5
  3. Construction in categories: product/coproduct, equalizer/coequalizer, Pushout/pullbacks

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

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    15
  4. 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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    1
  5. Normal subgroup and quotient subgroup

    Normal subgroup and quotient subgroup

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    5
  6. How to put 20 equilateral triangles on sphere

    How to put 20 equilateral triangles on sphere

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    4
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  7. Ring theory lecture - definition

    Ring theory lecture - definition

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    2
    12
  8. Gaussian integer and Fermat theorem

    Gaussian integer and Fermat theorem

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    6
    12
  9. the field of quotients of an integral domain

    the field of quotients of an integral domain

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    26
  10. 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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    7
  12. Counting formula in Group theory

    Counting formula in Group theory

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    15
  13. Correspondence theorem in Group theory and third isomorphism theorem

    Correspondence theorem in Group theory and third isomorphism theorem

    22
    3
    30
  15. Trigonometric/trig graphs

    Trigonometric/trig graphs

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    1
    4
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