Matrix factorizations and singularity categories for stacks

Polishchuk, Alexander; Vaintrob, Arkady

Annales de l'Institut Fourier, Tome 61 (2011) no. 7, pp. 2609-2642.

On étudie les factorisations matricielles d’un potentiel W qui est une section d’un fibré en droites sur un champ algébrique. On établit une relation entre la catégorie dérivée correspondante (la catégorie des D-branes de type B dans le modèle de Landau-Ginzburg avec potentiel W) et la catégorie des singularités du lieu des zéros de W généralisant un théorème d’Orlov. On utilise ce résultat pour construire des foncteurs image directe pour les factorisations matricielles à supports relativement propres.

We study matrix factorizations of a potential W which is a section of a line bundle on an algebraic stack. We relate the corresponding derived category (the category of D-branes of type B in the Landau-Ginzburg model with potential W) with the singularity category of the zero locus of W generalizing a theorem of Orlov. We use this result to construct push-forward functors for matrix factorizations with relatively proper support.

Classification : 14A20, 14J17, 18E30
Keywords: matrix factorizations, singularity category, algebraic stack
Mot clés : factorisations matricielles, catégorie des singularités, champ algébrique

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