Singularity categories, preprojective algebras and orthogonal decompositions

Claire Amiot (1)

1 IF - Institut Fourier

In this note we use results of Minamoto and Amiot, Iyama, Reiten to construct an embedding of the graded singularity category of certain graded Gorenstein algebras into the derived categories of coherent sheaves over its projective scheme. These graded algebras are constructed using the preprojective algebras of $d$-representation infinite algebras as defined by Herschend, Iyama and Oppermann. We relate this embedding to the construction of a semi-orthogonal decomposition of the derived category of coherent sheaves over the projective scheme of a Gorenstein algebra of parameter $1$ described by Orlov.

Mots clés: derived category; singularity category; Calabi-Yau algebra; preprojective algebra; orthogonal decomposition; recollement

Domaines: Théorie des représentations [math.RT]; Géométrie algébrique [math.AG]

Claire Amiot. Singularity categories, preprojective algebras and orthogonal decompositions. 2012. ⟨hal-00750685⟩