Hochschild homology invariants of Külshammer type of derived categories

Alexander Zimmermann (1)

1 LAMFA - Laboratoire Amiénois de Mathématique Fondamentale et Appliquée

For a perfect field $k$ of characteristic $p>0$ and for a finite dimensional symmetric $k$-algebra $A$ Külshammer studied a sequence of ideals of the centre of $A$ using the $p$-power map on degree $0$ Hochschild homology. In joint work with Bessenrodt and Holm we removed the condition to be symmetric by passing through the trivial extension algebra. If $A$ is symmetric then the dual to the Külshammer ideal structure was generalised to higher Hochschild homology in earlier work. In the present paper we follow this program and propose an analogue of the dual to the Külshammer ideal structure on the degree $m$ Hochschild homology theory also to not necessarily symmetric algebras.

Domaines: Théorie des représentations [math.RT]; Anneaux et algèbres [math.RA]

Alexander Zimmermann. Hochschild homology invariants of Külshammer type of derived categories. Communications in Algebra, 2011. ⟨hal-00483560⟩