25

Answers
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11
Ideas on how to prevent a department from being shut down.
7
What’s so great about blackboards?
18
Why forgetful functors usually have LEFT adjoint?
26
What is the Cayley projective plane?
13
Why does one think to Steenrod squares and powers?
7
Can a quotient ring R/J ever be flat over R?
7
(∞, 1)-categorical description of equivariant homotopy theory
-1
Is projectiveness a Zariski-local property of modules? (Answered: Yes!)
2
Definition of the symmetric algebra in arbitrary characteristic for graded vector spaces
7
Categories which are not compactly generated
8
What determines a model structure?
6
Cogroup Objects
10
Model structure of commutative dg-algebras inside all dg-algebras (2)
4
When is every submodule pure?
2
Hopf algebras arising as Group Algebras
6
Do the signs in Puppe sequences matter?
5
Freyd-Mitchell for triangulated categories?
10
Intuition about the triangulation of a homotopy category K(A)
5
Octonionic Unitary Group?
3
Faithfully flat descent over Hopf algebras in terms of comodule structures (2)
9
When is a commutative ring the limit of its local rings?
7
Is there a constructive description of type in the p-local stable homotopy category?
8
E_\infty spectrum corresponding to Z_p
5
Are injective Omega-spectra the S-local objects of symmetric spectra for some class S?
6
Spectra of rings that are projective module over a subring