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darij grinberg's user avatar
darij grinberg's user avatar
darij grinberg
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267 Answers

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5 votes

New formula for counting semi-standard Young tableaux?

8 votes
Accepted

Curious identity between the two kinds of Chebyshev polynomials

13 votes

Cubic polynomials over finite fields whose roots are quadratic residues or non-residues

8 votes
Accepted

Extension of a bilinear form to the exterior algebra

5 votes
Accepted

Expansions of iterated, or nested, derivatives, or vectors--conjectured matrix computation

56 votes

Why doesn't mathematics collapse even though humans quite often make mistakes in their proofs?

10 votes
Accepted

Sums of binomial coefficients weighted by incomplete gamma

22 votes

Is the field of q-series 'dead'?

12 votes
Accepted

Reciprocal sum of binomials and divisibility by $3$

3 votes
Accepted

Lyndon basis of free Lie superalgebras

2 votes
Accepted

Typo in a paper definition of Schubert cells?

13 votes
Accepted

How to organize collaborations? Managing shared library and LaTeX document

28 votes
Accepted

A Putnam problem with a twist

8 votes
Accepted

A symmetric bilinear form and a Plücker identity

2 votes
Accepted

Gale order on multisets of elements of a lattice

21 votes

Proof of a combinatorial equation

2 votes

Generating function in graph theory

8 votes

Is this sum of cycles invertible in $\mathbb QS_n$?

11 votes

Is this sum of cycles invertible in $\mathbb QS_n$?

16 votes
Accepted

Is this sum of cycles invertible in $\mathbb QS_n$?

12 votes
Accepted

Hopf dual of the Hopf dual

7 votes

Mathematical Writing: Proof Outlines/Overview in a Paper

24 votes
Accepted

A curious valuation of this sequence

7 votes
Accepted

$U\left(\mathfrak a\right) \otimes_{U\left(\mathfrak a\cap\mathfrak b\right)} U\left(\mathfrak b\right) \cong U\left(\mathfrak a + \mathfrak b\right)$ over a ring containing $\mathbb{Q}$

5 votes
Accepted

Constructive proof of a rational version of Perron-Frobenius?

5 votes
Accepted

Prove a special form of Schur polynomial identity

2 votes

GCD and LCM of elements in Prufer domain

4 votes
Accepted

Sum-coloring a tournament

16 votes
Accepted

Newman's Lemma or Diamond Lemma

9 votes

Vandermonde matrix is totally positive

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