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Igor Pak

Los Angeles, CA

http://www.math.ucla.edu/~pak/

I work at UCLA. My work page. My personal blog.

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Top Questions
36 votes

3-colorings of the unit distance graph of $\Bbb R^3$

co.combinatorics graph-theory discrete-geometry graph-colorings ramsey-theory asked Apr 14, 2015 at 5:05
mathoverflow.net

34 votes

Do plane projections determine a convex polytope?

convex-polytopes asked Feb 17, 2010 at 19:18
mathoverflow.net

28 votes

Inequality for hook numbers in Young diagrams

co.combinatorics inequalities partitions algebraic-combinatorics young-tableaux asked Jul 7, 2016 at 1:53
mathoverflow.net

20 votes

Is prime-counting function #P-complete?

cc.complexity-theory counting-complexity nt.number-theory comp-number-theory primes asked May 22, 2019 at 23:56
cstheory.stackexchange.com

19 votes

Division by two of functions in #P

cc.complexity-theory complexity-classes counting-complexity asked Jan 5, 2016 at 10:41
cstheory.stackexchange.com

19 votes

Values of hypergeometric functions

analytic-number-theory hypergeometric-function transcendence-theory asked Dec 29, 2013 at 6:29
math.stackexchange.com

18 votes

Linear groups which don't contain products of free groups

gr.group-theory geometric-group-theory free-groups linear-groups asked Feb 20, 2015 at 18:19
mathoverflow.net

18 votes

How to construct a small coprime?

nt.number-theory prime-numbers computational-number-theory asked Sep 13, 2017 at 10:00
mathoverflow.net

18 votes

Complexity of a Fibonacci numbers discrete log variation

nt.number-theory computational-complexity computational-number-theory fibonacci-numbers asked Nov 29, 2017 at 10:32
mathoverflow.net

16 votes

Plane partitions with equal margins

co.combinatorics asymptotics partitions young-tableaux asked Jan 28, 2020 at 20:57
mathoverflow.net

1 2 3

Top Answers
60
Careers advice for Ph.D.s without current postdocs or university jobs
mathoverflow.net

47
5/8 bound in group theory
mathoverflow.net

44
What are some examples of interesting uses of the theory of combinatorial species?
mathoverflow.net

41
Oneupsmanship and Publishing Etiquette
mathoverflow.net

41
What are the external triumphs of matroid theory?
mathoverflow.net

37
When your paper makes a borderline case for a top journal
mathoverflow.net

35
Is discrete mathematics mainstream?
mathoverflow.net

29
What is the oldest open problem in mathematics?
mathoverflow.net

29
Classification of Platonic solids
mathoverflow.net

27
Why is a general formula for Kostka numbers "unlikely" to exist?
math.stackexchange.com

27
Math paper authors' order
mathoverflow.net

27
Do you read the masters?
mathoverflow.net

27
When is it appropriate to entitle a paper "A note on..." or "On the ..."?
mathoverflow.net

26
Theorems with unexpected conclusions
mathoverflow.net

26
When does every point in a polytope lie along a chord between its edges?
mathoverflow.net

25
What can be tiled by T-tetrominoes?
mathoverflow.net

24
What (if anything) happened to Viennot's theory of Heaps of pieces?
mathoverflow.net

23
The Discrete Hairy-Ball Theorem
mathoverflow.net

22
Making an intuition precise
mathoverflow.net

22
Why are we interested in permutahedra, associahedra, cyclohedra, ...?
mathoverflow.net

22
What are examples of mathematical concepts named after the wrong people? (Stigler's law)
mathoverflow.net

22
How does an academic mathematician educate him/herself about job opportunities outside academia?
mathoverflow.net

21
Triangulations of polyhedra
mathoverflow.net

21
Random Alternating Permutations
mathoverflow.net

21
Mathematics as a hobby
mathoverflow.net

21
Factors of p-1 when p is prime.
mathoverflow.net

21
Quick proofs of hard theorems
mathoverflow.net

20
How do I fix someone's published error?
mathoverflow.net

20
Tetrahedra with prescribed face angles
mathoverflow.net

20
Bijective proof for a partition identity
mathoverflow.net

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