darij grinberg's user avatar
darij grinberg's user avatar
darij grinberg's user avatar
darij grinberg
  • Member for 14 years, 3 months
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10 votes

Does seeing beyond the course you teach matter? The case of linear algebra and matrices

11 votes

Problems concerning subspaces of $M_n(\mathbb{C})$

2 votes
Accepted

Typo in a paper definition of Schubert cells?

7 votes

Can transcedence degree be defined for arbitrary ring homomorphism?

21 votes

Proof of a combinatorial equation

18 votes

Jacobi's equality between complementary minors of inverse matrices

11 votes

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

8 votes

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

13 votes
Accepted

How to organize collaborations? Managing shared library and LaTeX document

10 votes

Nontrivial question about Fibonacci numbers?

6 votes

The action of $GL_{\infty}$ on the infinite wedge space

4 votes

Counting chains of inclusions

16 votes
Accepted

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

4 votes

Let $G$ be a graph such that for all $u, v ∈ V (G)$, $u \ne v$, $|N (u) ∩ N (v )|$ is odd. Then show that the number of vertices in $G$ is odd

2 votes
Accepted

Gale order on multisets of elements of a lattice

7 votes

Product of Positive Matrices

5 votes
Accepted

Constructive proof of a rational version of Perron-Frobenius?

1 vote

Rank of a symmetric ideal

2 votes

Generating function in graph theory

10 votes

Structures that turn out to exhibit a symmetry even though their definition doesn't

4 votes
Accepted

Hopf Duals and Matrix Coefficients

7 votes

Mathematical Writing: Proof Outlines/Overview in a Paper

24 votes
Accepted

A curious valuation of this sequence

2 votes

GCD and LCM of elements in Prufer domain

5 votes

Is there an explicit construction of a free coalgebra?

5 votes
Accepted

Do n-th Witt polynomials generate {P | P' is divisible by n} ?

4 votes
Accepted

Sum-coloring a tournament

9 votes

Vandermonde matrix is totally positive

7 votes
Accepted

Proofs of some combinatorial identities

5 votes
Accepted

Determinants: periodic entries $0,1,2,3$

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