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Top Questions
20
votes
Is $\mathbb{N}$ impossible to pin down?
logic
soft-question
model-theory
philosophy
foundations
asked May 9 at 11:40
math.stackexchange.com
18
votes
Struggling with “technique-based” mathematics, can people relate to this? And what, if anything, can be done about it?
soft-question
asked Mar 3 at 2:39
math.stackexchange.com
16
votes
Why hasn't GCH become a standard axiom of ZFC?
set-theory
cardinals
axioms
asked Mar 31 at 4:42
math.stackexchange.com
16
votes
Which comes first - truth or provability?
epistemology
philosophy-of-mathematics
asked Apr 25 at 5:58
philosophy.stackexchange.com
15
votes
Non-associative version of a group satisfying these identities: $(xy)y^{-1}=y^{-1}(yx)=x$
abstract-algebra
asked May 16 at 11:49
math.stackexchange.com
14
votes
What is dual to “There exists unique?”
logic
quantifiers
asked May 10 at 15:12
math.stackexchange.com
12
votes
Is there an axiomatic approach to ordinal arithmetic?
reference-request
ordinals
axioms
asked Mar 24 at 8:32
math.stackexchange.com
12
votes
Can an algebraic structure have indistinguishable elements?
abstract-algebra
asked 23 hours ago
math.stackexchange.com
12
votes
Smaller membership symbol
symbols
fontsize
size
asked Nov 14 '12 at 11:40
tex.stackexchange.com
11
votes
Is second order logic even a logic?
logic
higher-order-logic
asked May 13 at 22:47
math.stackexchange.com
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Top Answers
7
What is the first cardinal number which is grearter than continuum?
math.stackexchange.com
5
What was the first bit of mathematics that made you realize that math is beautiful? (For children's book)
math.stackexchange.com
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