Ben Wieland

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Name Ben Wieland
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What do people mean by “subcategory”?

may 27 10 at 20:19 lol 1

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169
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Did Smith correctly state the mass formula?

may 15 at 1:16 Will Jagy 12.5k●1●26●45

 

44

Answers
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18
A “meta-mathematical principle” of MacPherson
16
Natural examples of sequences of adjoint functors
14
Is there a universal countable group? (a countable group containing every countable group as a subgroup)
11
Difference between represented and singular cohomology?
10
What is a simplicial commutative ring from the point of view of homotopy theory?
9
Good reference for homology of $K(\mathbb{Z}, 2n)$?
9
Infinite groups which contain all finite groups as subgroups
8
Can we reconstruct positive weight invariants in algebraic topology using algebraic geometry?
7
Does Physics need non-analytic smooth functions?
6
What are normalized singular chains good for?
6
L-S category versus Betti numbers
6
Cohomological dimension of a group, fibration and local coefficients
6
$H_2(H,\mathbb{Z})$ where H is a f.g. normal subgroup of a f.p. group.
5
A simple minded Poincare duality for orbifolds?
5
Significance of the vanishing of $K_{-1}(A)$
5
Connection between isomorphisms of algebraic topology and class field theory
5
What should be learned in a first serious schemes course?
4
Category = Groupoid x Poset?
4
Is there analogue of Peter-Weyl theorem for non-compact or quantum group
4
Non-simply-connected smooth proper scheme over Z? (2)
4
Quick ways to calculate cohomology of vector bundle/local system from transition functions?
4
Spaces with same homotopy and homology groups that are not homotopy equivalent?
4
When are non-quasi-coherent sheaves used?
4
When are (finite) simplicial complexes (smooth) manifolds?
4
Curves which are not covers of P^1 with four branch points
4
What does the Tannakian formalism reconstruct when fed the category of chain complexes?
4
Is an A-infinity thing the same the same as strict thing viewed through a homotpy equivalence?
3
For which local $R$ its K-theory mod l is isomorphic to the one of its residue field?
3
Simple Tamagawa number calculations
3
Background for Hejhal’s "The Selberg Trace Formula for $PSL(2, \mathbb{R})$
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