User user717 - MathOverflow

user717

Member for 15 years, 2 months

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Nov 3, 2023

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Nov 17, 2009
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Apr 10, 2020

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Jul 2, 2014
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Oct 28, 2009
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Nov 4, 2009

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Top posts

View all questions and answers

83

What is a cohomology theory (seriously)?

Nov 19, 2009

45

Universal definition of tangent spaces (for schemes and manifolds)

Nov 4, 2009

38

Definitions of Hecke algebras

Nov 7, 2009

38

Why are flat morphisms "flat?"

Nov 25, 2009

37

Why is Milnor K-theory not ad hoc?

Nov 5, 2009

29

Errata database?

Oct 28, 2009

29

How can I really motivate the Zariski topology on a scheme?

Dec 8, 2009

19

Closed vs Rational Points on Schemes

Feb 2, 2010

18

Preschemes and schemes

Jan 10, 2010

15

Simultaneous diagonalization

Dec 22, 2009