current community
chat
MathOverflow
MathOverflow Meta
your communities
Sign up
or
log in
to customize your list.
more stack exchange communities
company blog
Stack Exchange
Inbox
Reputation and Badges
sign up
log in
tour
help
Tour
Start here for a quick overview of the site
Help Center
Detailed answers to any questions you might have
Meta
Discuss the workings and policies of this site
MathOverflow
Questions
Tags
Users
Badges
Unanswered
Ask Question
Profile
Activity
Asaf Karagila
Meta User
Network Profile
Reputation
13,443
13.4k
7.5k
1.6k
2013
2014
2015
2016
Next tag badge:
axiom-of-choice
531/400 score
72/80 answers
Badges
4
47
117
Newest
Necromancer
Next badge
83/100
Socratic
Impact
~
381k
people reached
93 posts edited
204 helpful flags
3,089 votes cast
summary
answers
questions
tags
badges
favorites
bounties
reputation
all actions
156
Answers
newest
activity
votes
69
Mathematical “urban legends”
Jan 31 '11 at 18:53
54
Which math paper maximizes the ratio (importance)/(length)?
Oct 29 '11 at 22:39
27
Linear Algebra without Choice
Sep 19 '13 at 22:24
24
How much of GCH do we need to guarantee well-ordering of continuum?
Jul 2 '14 at 7:44
21
When was the continuum hypothesis born?
Jul 6 '13 at 8:50
19
Hahn's Embedding Theorem and the oldest open question in set theory
Apr 27 '13 at 23:01
18
Non continuous Linear form on $E=C([0,1],\mathbb{R})$ without AC
Oct 14 '13 at 17:55
18
Compactness of the Hilbert cube without the Axiom of Choice
Jan 19 '13 at 21:54
17
Linear maps between arbitrarily chosen vectors of vector spaces $V$ and $W$
Mar 24 '14 at 9:20
16
Replacing Axiom of Choice with Axiom of Countable Choice
Nov 10 '15 at 4:53
15
Does “cardinal arithmetic is well-defined” imply axiom of choice?
Aug 2 '15 at 11:51
15
Difference between ZFC and ZF+GCH
Oct 31 '14 at 14:53
15
Weak forms of the Axiom of Choice
Feb 9 '14 at 8:11
14
Do Measurable Cardinals Exist? (assuming ZFC)
Jul 8 '13 at 21:36
13
Notions of infinity in $\mathsf{ZF}$ without choice
Mar 30 '15 at 7:38
13
Is not SH + not CH consistent?
Aug 9 '14 at 10:24
13
Can $\mathbb{R}$ be partitioned into dedekind-finite sets?
Feb 9 '14 at 5:31
13
Not especially famous, long-open problems which higher mathematics beginners can understand
Feb 22 '13 at 23:27
13
Most memorable titles
May 8 '11 at 14:59
12
Is $\mathbb{R}$ a $\mathbb{C}$-module without AC?
Sep 18 '14 at 7:52
12
A question about the Axiom of Choice
Jul 6 '13 at 18:50
12
Does a nonlinear additive function on R imply a Hamel basis of R?
Apr 20 '13 at 19:19
12
Trichotomies in mathematics
Feb 3 '13 at 14:32
12
Mathematics with the negation of AC
Jan 22 '13 at 14:11
12
Axiom of choice and bases of vector spaces over a fixed field
Jun 27 '11 at 20:23
11
Exponentiation and Dedekind-finite cardinals
Aug 26 '14 at 13:41
11
Discontinuous representations of GL(n,C) in ZF
Nov 25 '13 at 22:10
11
ZF + the reals are the countable union of countable sets consistent
Jun 26 '12 at 22:33
11
Examples of undergraduate mathematics separation from what mathematicians should know
Jul 6 '10 at 18:17
10
Is there a “natural” bijection between models of $ZFC$ and $ZF\neg C$?
Dec 18 '14 at 19:54
MathOverflow works best with JavaScript enabled