Julian Holstein

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math.AG2025

Gluing invariants of Donaldson--Thomas type -- Part II: Matrix factorizations

Benjamin Hennion, Julian Holstein, Marco Robalo

This paper is a follow-up to arXiv:2407.08471. Let $X$ be a a $(- 1)$ -shifted symplectic derived Deligne--Mumford stack. Thanks to the Darboux lemma of Brav--Bussi--Joyce, $X$ is lo…

math.AG2024

Gluing invariants of Donaldson--Thomas type -- Part I: the Darboux stack

Benjamin Hennion, Julian Holstein, Marco Robalo

Let $X$ be a (-1)-shifted symplectic derived Deligne--Mumford stack. In this paper we introduce the Darboux stack of $X$ , parametrizing local presentations of $X$ as a derived crit…