Stack Exchange

Kevin H. Lin

New York, NY

I finished my PhD in Mathematics at UC Berkeley in December 2012. I'm currently employed by Google as a software engineer, working on machine learning and natural language processing.

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Top Questions
289 votes

Dashes: - vs. – vs. —

punctuation typography asked Oct 6 '10 at 16:28
tex.stackexchange.com

68 votes

How should one present curl and divergence in an undergraduate multivariable calculus class?

dg.differential-geometry big-list mathematics-education asked Apr 19 '10 at 19:58
mathoverflow.net

53 votes

Non-commutative algebraic geometry

ag.algebraic-geometry noncommutative-geometry asked Dec 5 '09 at 22:53
mathoverflow.net

51 votes

Applications of Grothendieck-Riemann-Roch?

reference-request ag.algebraic-geometry kt.k-theory-homology asked Oct 27 '10 at 7:25
mathoverflow.net

49 votes

Definition of “simplicial complex”

at.algebraic-topology asked Nov 20 '09 at 16:40
mathoverflow.net

40 votes

What is Chern-Simons theory?

chern-simons-theory quantum-field-theory tqft mp.mathematical-physics asked Oct 31 '09 at 1:12
mathoverflow.net

38 votes

Why should algebraic objects have naturally associated topological spaces? (Formerly: What is a topological space?)

gn.general-topology ag.algebraic-geometry noncommutative-geometry oa.operator-algebras asked Feb 8 '10 at 11:42
mathoverflow.net

36 votes

Simplicial objects

derived-category simplicial-stuff at.algebraic-topology asked Oct 16 '09 at 1:17
mathoverflow.net

35 votes

What is a deformation of a category?

deformation-theory ct.category-theory derived-category dg-algebras ag.algebraic-geometry asked Nov 13 '09 at 14:59
mathoverflow.net

34 votes

Computing fundamental groups and singular cohomology of projective varieties

ag.algebraic-geometry at.algebraic-topology asked Feb 12 '10 at 8:29
mathoverflow.net

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Top Answers
95
Best algebraic geometry textbook? (other than Hartshorne)
mathoverflow.net

60
Most interesting mathematics mistake?
mathoverflow.net

44
Heuristic behind the Fourier-Mukai transform
mathoverflow.net

43
d3 ticks only shows Sundays:
stackoverflow.com

43
Ways to prove the fundamental theorem of algebra
mathoverflow.net

42
Geometric meaning of the Euler sequence on $\mathbb{P}^n$ (Example 8.20.1 in Ch II of Hartshorne)
mathoverflow.net

37
Fundamental Examples
mathoverflow.net

33
Mathematicians who were late learners?-list
mathoverflow.net

30
How to prove and interpret $\operatorname{rank}(AB) \leq \operatorname{min}(\operatorname{rank}(A), \operatorname{rank}(B))$?
math.stackexchange.com

28
What are some applications of other fields to mathematics?
mathoverflow.net

26
Motivating Example for Algebraic Geometry/Scheme Theory
math.stackexchange.com

26
Nice proof of the Jordan curve theorem?
mathoverflow.net

26
Why is it useful to study vector bundles?
mathoverflow.net

24
Why torsion is important in (co)homology ?
mathoverflow.net

23
GAGA and Chern classes
mathoverflow.net

23
What is the first interesting theorem in (insert subject here)?
mathoverflow.net

23
Matrix factorizations and physics
mathoverflow.net

23
What should be learned in a first serious schemes course?
mathoverflow.net

23
What is (co)homology, and how does a beginner gain intuition about it?
mathoverflow.net

23
What is 'formal' ?
mathoverflow.net

21
Meaning of relative homology
math.stackexchange.com

20
Good books and lecture notes about category theory.
math.stackexchange.com

19
A single paper everyone should read?
mathoverflow.net

17
Never appeared forthcoming papers
mathoverflow.net

17
What should be learned in a first serious schemes course?
mathoverflow.net

16
Doing geometry using Feynman Path Integral?
mathoverflow.net

16
Origins of Mathematical Symbols/Names
mathoverflow.net

16
What are some examples of colorful language in serious mathematics papers?
mathoverflow.net

16
Proving Hodge decomposition without using the theory of elliptic operators?
mathoverflow.net

16
Examples in mirror symmetry that can be understood.
mathoverflow.net

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