112

Questions

votes newest views recent

19

26

votes

10

answers

3k

views

Is there a mathematical axiomatization of time (other than, perhaps, entropy)?

statistical-physics geometry ho.history-overview mp.mathematical-physics soft-question

nov 28 11 at 23:07 Peter Arndt 6,888●18●42

7

23

votes

3

answers

2k

views

when is the power of a nonnegative polynomial a sum of squares?

ra.rings-and-algebras ag.algebraic-geometry polynomials

mar 9 11 at 5:30 Colin Tan 4,211●13●43

22

21

votes

5

answers

3k

views

Categorical foundations without set theory

lo.logic ct.category-theory math-philosophy

jan 1 10 at 12:52 Paul Taylor 1,233●5●9

39

21

votes

17

answers

5k

views

introductory book on spectral sequences

homological-algebra spectral-sequences big-list soft-question textbook-recommendation

oct 31 11 at 9:31 Ketil Tveiten 402●2●10

8

17

votes

11

answers

2k

views

When does ‘positive’ imply ‘sum of squares’?

examples ca.analysis-and-odes nt.number-theory matrices polynomials

may 10 11 at 0:40 Nate Eldredge 5,748●24●48

18

15

votes

10

answers

3k

views

Riemannian Geometry Introductory Text

dg.differential-geometry riemannian-geometry big-list textbook-recommendation

feb 8 at 12:12 Koushik 532●1●10

8

14

votes

3

answers

2k

views

sum of squares in ring of integers

algebraic-number-theory number-fields positivity nt.number-theory

1d ago KConrad 17k●3●61●117

5

13

votes

2

answers

420

views

Can the unit complex 1-dimensional disc be embedded isometrically into complex euclidean space?

dg.differential-geometry polynomials cv.complex-variables

apr 16 11 at 23:00 Robert Bryant 21.8k●3●75●97

4

12

votes

2

answers

469

views

Projective variety with no syzygies but not isomorphic to projective space

ag.algebraic-geometry complex-geometry

nov 7 10 at 0:20 Sándor Kovács 23.7k●2●52●73

18

11

votes

28

answers

7k

views

Alternative Undergraduate Analysis Texts

soft-question big-list books textbook-recommendation

apr 20 at 10:48 Henr.L 80●7