Tony Huynh's user avatar
Tony Huynh's user avatar
Tony Huynh's user avatar
Tony Huynh
  • Member for 14 years, 4 months
  • Last seen this week
62 votes

What are your favorite instructional counterexamples?

51 votes

Major mathematical advances past age fifty

44 votes
Accepted

For consecutive primes $a\lt b\lt c$, prove that $a+b\ge c$.

41 votes
Accepted

What happens if you strip everything but the “between” relation in metric spaces

40 votes

What are the external triumphs of matroid theory?

36 votes
Accepted

Can one measure the infeasibility of four color proofs?

33 votes

When are two proofs of the same theorem really different proofs

32 votes
Accepted

Function of $(x_1,x_2,x_3,x_4)$ that factors in two ways as $\phi_1 (x_1 ,x_2 )\phi_2(x_3 ,x_4 )=\psi_1 (x_1,x_3)\psi_2(x_2,x_4)$

31 votes

Obstructions for embedding a graph on a surface of genus g

28 votes

Can a problem be simultaneously polynomial time and undecidable?

28 votes

Most intricate and most beautiful structures in mathematics

28 votes

What are your favorite instructional counterexamples?

26 votes

Important open problems that have already been reduced to a finite but infeasible amount of computation

25 votes

What is your favorite isomorphism?

25 votes

Can a convex polytope with $f$ facets have more than $f$ facets when projected into $\mathbb{R}^2$?

23 votes

What well known results with countability assumptions can be naturally extended to uncountable settings?

23 votes

How to tell if two random polynomials are identical

23 votes

Generalizing a problem to make it easier

23 votes

Counting non-isomorphic graphs with prescribed number of edges and vertices

22 votes
Accepted

Realizing groups as automorphism groups of graphs.

22 votes

Does minimal degree $n$ imply a $K_n$ minor

20 votes

Difficult examples for Frankl's union-closed conjecture

20 votes

Menger's theorem via matroids

19 votes

Is there a version of König's theorem for tripartite 3-graphs?

19 votes

Does every convex polyhedron have a combinatorially isomorphic counterpart whose faces all have rational areas?

19 votes
Accepted

Lagrange four-squares theorem --- deterministic complexity

18 votes
Accepted

Category theoretic interpretation of matroids?

18 votes

Favorite popular math book

17 votes

Applications of infinite graph theory

17 votes

The concept of duality

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