Mathematics
Zhen Lin
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977 Answers

Newest Activity Votes
64
Why did my friend lose all his money?
Aug 28 '12 at 9:05
41
In set theory, how are real numbers represented as sets?
Sep 8 '11 at 15:45
38
What are the Axiom of Choice and Axiom of Determinacy?
Jul 20 '11 at 10:55
37
Understanding Ramification Points
May 29 '12 at 10:59
36
Why must we distinguish between rational and irrational numbers?
Dec 9 '12 at 20:27
35
What are differences between affine space and vector space?
Aug 1 '14 at 14:35
35
Quotient objects, their universal property and the isomorphism theorems
Sep 1 '11 at 15:50
34
When to learn category theory?
Feb 9 '11 at 7:41
33
Why use ZF over NFU?
Sep 9 '12 at 18:30
32
Are some real numbers “uncomputable”?
Aug 17 '11 at 12:47
32
What is the 'implicit function theorem'?
Mar 10 '11 at 18:49
30
Do De Morgan's laws hold in propositional intuitionistic logic?
Mar 14 '12 at 19:41
28
Zero probability and impossibility
May 24 '11 at 19:58
24
Good references for stacks
Dec 10 '12 at 0:16
24
Tautological 1-form on the cotangent bundle
Dec 6 '12 at 9:25
24
Best way to learn Algebraic Geometry?
Dec 26 '11 at 8:09
24
Is Zorn's lemma required to prove the existence of a maximal atlas on a manifold?
Sep 22 '11 at 6:35
23
Does taking the direct limit of chain complexes commute with taking homology?
May 24 '13 at 17:31
23
Surjectivity implies injectivity
Sep 9 '11 at 10:37
22
Questions regarding Riemann's rearrangement theorem
May 23 '11 at 17:20
20
Does “cheap nonstandard analysis” take place in a topos?
Jul 29 '13 at 9:09
18
Gluing sheaves - can we realize $\mathcal{F}(W)$ as some kind of limit?
Jul 30 '13 at 18:15
18
How to prove the mathematical induction is true?
Feb 27 '11 at 10:56
18
Why is Peano arithmetic undecidable?
Jan 7 '11 at 17:07
17
Difference between being faithful and being injective on arrows
Jun 19 '14 at 6:32
17
Double negation elimination in constructive logic
Jun 3 '12 at 11:27
16
Confusion about Homotopy Type Theory terminology
Aug 3 '13 at 20:08
16
Vector bundle transitions and Čech cohomology
Sep 17 '12 at 12:35
15
“Nice proof” that the unit of the left Kan extension of $F$ is an isomorphism, if $F$ is fully faithful
Aug 10 '14 at 8:43
15
Why are de Rham cohomology and Cech cohomology of the constant sheaf the same
Feb 13 '14 at 9:23
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