53

Questions
votes newest views recent
55
71
votes
26
answers
8k
views

How To Present Mathematics To Non-Mathematicians?

apr 6 12 at 21:02 Ronnie Brown 5,287●19●20

7
27
votes
1
answer
2k
views

Does $2^X=2^Y\Rightarrow |X|=|Y|$ imply the axiom of choice?

aug 25 at 0:13 Asaf Karagila 7,243●1●14●44

2
16
votes
3
answers
2k
views

Half Cantor-Bernstein Without Choice

may 19 11 at 9:07 Ricky Demer 6,411●8●31

1
13
votes
1
answer
1k
views

Countable Unions And The Axiom Of Countable Choice

sep 18 11 at 4:36 godelian 923●7●12

5
21
votes
1
answer
1k
views

If $V$ is a vector space with a basis. $W\subseteq V$ has to have a basis too?

nov 14 11 at 1:05 Goldstern 5,260●1●12●27

2
13
votes
2
answers
1k
views

Does ZFC prove the universe is linearly orderable?

nov 3 at 3:47 Joel David Hamkins 75.5k●8●189●347

5
16
votes
2
answers
789
views

What is a Choice Principle, really?

aug 6 at 8:59 Andrej Bauer 12.5k●27●69

1
10
votes
3
answers
778
views

Universal sets in metric spaces

sep 23 at 12:45 Theo Buehler 3,666●1●11●25

5
18
votes
1
answer
774
views

The Continuum Hypothesis and Countable Unions

oct 18 at 14:10 Asaf Karagila 7,243●1●14●44

3
10
votes
4
answers
752
views

Forcing over models without the axiom of choice

oct 2 11 at 0:23 Andreas Blass 33k●4●55●110

1 2 3 4 5 6 next