64

Questions

votes newest views recent

100

63

votes

74

answers

16k

views

Examples of great mathematical writing

writing soft-question big-list

dec 15 at 4:14 Rodrigo A. Pérez 1,682●9●21

65

92

votes

26

answers

9k

views

What are some reasonable-sounding statements that are independent of ZFC?

independence-results examples set-theory lo.logic big-list

may 9 at 20:36 Santi Spadaro 666●4●6

29

37

votes

21

answers

8k

views

Interesting applications of the Pigeon-hole Principle

pigeon-hole big-list

jan 26 12 at 21:48 David White 4,860●1●20●27

12

18

votes

9

answers

4k

views

Can a vector space over an infinite field be a finite union of proper subspaces?

linear-algebra

may 22 12 at 18:55 Adam Azzam 99●6

6

13

votes

12

answers

4k

views

Alternatives to pi day

recreational

jul 19 10 at 14:53 Punxas 1●1

17

28

votes

7

answers

3k

views

Is there a measure zero set which isn’t meagre?

gn.general-topology measure-theory examples

oct 26 10 at 6:49 Stefan Geschke 10.6k●1●14●37

8

12

votes

3

answers

3k

views

Finite extension of fields with no primitive element

ac.commutative-algebra examples fields characteristic-p

jun 24 10 at 9:05 Charles Matthews 9,740●13●39

23

44

votes

4

answers

3k

views

What do epimorphisms of (commutative) rings look like?

ac.commutative-algebra

nov 14 at 20:31 Torsten Schoeneberg 423●3●7

6

15

votes

8

answers

2k

views

Is every finite-dimensional Lie algebra the Lie algebra of an algebraic group?

lie-algebras lie-groups algebraic-groups

may 5 10 at 18:43 Jim Humphreys 26.1k●38●84

6

25

votes

5

answers

2k

views

The ants-on-a-ball problem

puzzle gn.general-topology

nov 23 09 at 21:22 HW 10.1k●1●23●66