101

Questions

votes newest views recent

18

18

votes

2

answers

3k

views

What is descent theory?

descent ag.algebraic-geometry ct.category-theory

12h ago Qfwfq 8,482●33●85

16

34

votes

10

answers

2k

views

Why is Set, and not Rel, so ubiquitous in mathematics?

soft-question big-picture relation-algebra ct.category-theory

may 20 at 6:23 Wlodzimierz Holsztynski 1,046●4●7

1

1

vote

2

answers

334

views

Affinization and properization of algebraic varieties ?

ag.algebraic-geometry

apr 25 at 10:58 Kepher 11●1

30

55

votes

15

answers

3k

views

Does Physics need non-analytic smooth functions?

soft-question mp.mathematical-physics ap.analysis-of-pdes analytic-functions

apr 25 at 6:54 ACL 4,255●12●24

1

vote

1

answer

91

views

What’s the name of “twisted semidirect products”?

reference-request notation

mar 30 at 21:05 Lee Mosher 5,866●1●9●26

5

votes

4

answers

405

views

Applications of n-dimensional crystallographic groups

gr.group-theory lattices euclidean-lattices euclidean-geometry

mar 27 at 15:08 Qfwfq 8,482●33●85

0

votes

1

answer

77

views

A little question on certain parallel-lines-preserving maps

projective-geometry euclidean-geometry linear-algebra

mar 1 at 20:53 Misha 12.6k●1●26●48

3

votes

3

answers

362

views

Undecidability and holomorphic functions (Reference request)

reference-request complex-analysis independence-results

feb 20 at 18:06 quid 13.2k●31●51

2

10

votes

2

answers

383

views

Noncontractible connected topological rings ?

ra.rings-and-algebras homotopy-theory gn.general-topology

jan 26 at 21:46 Todd Trimble 22.3k●1●62●96

1

8

votes

3

answers

955

views

Set-theoretical multiverse and foundations

multiverse-of-sets set-theory foundations

jan 10 at 1:44 david thurman 1