252

Questions

votes newest views recent

4

14

votes

3

answers

1k

views

Is there a scheme corresponding to the unit interval?

ag.algebraic-geometry ct.category-theory homotopy-theory soft-question

2d ago John Stalfos 29●1●4

2

3

votes

1

answer

204

views

Families of local rings coming from a locally ringed space

sheaf-theory ag.algebraic-geometry

apr 26 at 19:45 Manny Reyes 2,058●7●17

5

11

votes

1

answer

637

views

Analogy between the exterior power and the power set

categorification ct.category-theory exterior-algebra symmetric-monoidal-catego

jun 9 at 14:22 MathOverflow♦ 1●2●3

2

5

votes

2

answers

324

views

IBN for algebraic theories

ra.rings-and-algebras universal-algebra reference-request algebraic-theory

apr 10 at 12:25 Martin Brandenburg 29.5k●2●47●133

1

12

votes

1

answer

539

views

Principal maximal ideals in Z[x]/(F)

ag.algebraic-geometry ac.commutative-algebra combinatorial-game-theory algebraic-number-theory

mar 20 at 4:34 ayanta 538●2●9

3

5

votes

1

answer

276

views

What about schemes built up out of graded rings?

ag.algebraic-geometry schemes monoidal-categories

mar 14 at 1:40 David Ben-Zvi 12.6k●1●28●51

5

votes

1

answer

280

views

Baer’s criterion for projective modules

modules ac.commutative-algebra projective-module

mar 12 at 14:43 Jeremy Rickard 1,838●1●6●10

2

votes

1

answer

109

views

Open idempotents in modules over a local ring

ac.commutative-algebra local-rings modules

mar 6 at 13:54 Laurent Moret-Bailly 7,356●19●29

1

7

votes

0

answers

157

views

Colimits of quasi-coherent sheaves on a ringed space

quasi-coherent-modules ringed-spaces ct.category-theory reference-request sheaf-theory

feb 28 at 5:01 Martin Brandenburg 29.5k●2●47●133

2

5

votes

1

answer

206

views

Unitalization internal to monoidal categories

monoidal-categories ct.category-theory

feb 18 at 19:20 Todd Trimble 22.7k●1●64●97