Darij Grinberg

activity

20242026

most citedDouble posets and the antipode of QSym

13 citations · 41 across the 26 of their papers we have counts for

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math.AC2026

Powers of matrices with all principal minors equal to 1

Darij Grinberg

We say that a square matrix $A$ is \emph{ $1$ -principled} if all its principal minors are equal to $1$ . We show that over any well-behaved ring, any power $A^{m}$ of a $1$ -principled…

math.AC2026

A constructive proof of Orzech's theorem

Darij Grinberg

Let $A$ be a commutative ring with unity, and $M$ a finitely generated $A$ -module. In 1971, Morris Orzech showed that any surjective $A$ -module homomorphism from a submodule of $M$ …