Georges Elencwajg

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Name Georges Elencwajg
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Arbitrary products of schemes don’t exist, do they?

dec 19 at 16:44 Jonathan Wise 1,688●1●12

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11
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Should Krull dimension be a cardinal?

jan 21 at 21:57 Mariano Suárez-Alvarez 10.4k●16●54

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Cubical vs. simplicial singular homology

nov 2 at 18:42 Peter Arndt 2,197●1●17

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3
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620
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How many mathematicians are there?

nov 17 at 14:20 Kevin O'Bryant 851●1●16

 

 
2
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3
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Non-zero sheaf cohomology

oct 16 at 17:48 Abdó Roig 371●1●4

 

55

Answers
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36
Justifying a theory by a seemingly unrelated example (2)
23
Etale cohomology — Why study it?
22
equivalence of Grothendieck-style versus Cech-style sheaf cohomology
20
Is there a compact group of countably infinite cardinality?
18
Is there a Whitney theorem type theorem for projective schemes?
15
Kahler differentials and Ordinary Differentials
15
Too old for advanced mathematics?
13
Theorems for nothing (and the proofs for free)
13
Universal definition of tangent spaces (for schemes and manifolds)
13
Using linear algebra to classify vector bundles over P^1
12
Uniformization theorem in higher dimensions
12
What are the open subsets of $\mathbb{R}^n$ that are diffeomorphic to $\mathbb{R}^n$
12
Is there any rational curve on an Abelian variety?
10
A GAGA question
10
Intuition for Group Cohomology
10
Most important domains, extension theorems, and functions in several complex variables
10
A complex manifold which is quasiprojective in two different ways
10
Is a ‘generic’ variety nonsingular? Or singular?
10
Motivation for concepts in Algebraic Geometry
7
Atiyah-MacDonald, exercise 2.11
7
Fundamental Examples
7
Which mathematicians have influenced you the most?
7
Classification of finite commutative rings
7
Is there an existing name for “piecewise vector multiplication”
6
Applications of the “other” definition of Sheaves
5
Non-integral scheme having integral local rings
5
Important results that use infinite-dimensional manifolds?
4
Geometry meaning of higher cohomology of sheaves?
4
What is the right version of “partitions of unity implies vanishing sheaf cohomology”
4
Algebraic data and purity associated to codimension greater than 2
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