C. Todea

collaborators

3 papers

math.KT2026

Equivariant Hochschild cohomology of group algebras and relative $Ext$

Andrada Pojar, Constantin-Cosmin Todea

For a finite group $I^$ , acting on a finite group $G,$ we find necessary conditions for which the first $I^_{0}$ -equivariant Hochschild cohomology of the group algebra $k G$ is non-tr…

math.RT2026

Reduction theorems for a conjecture on basis in source algebras of blocks of finite groups

Tiberiu Coconet, Constantin-Cosmin Todea

The aim of this short research note is to present some results about a conjecture of Barker and Gelvin claiming that any source algebra of a block of a finite group has the unit gr…

math.RT2025

A reduction theorem for non-vanishing of Hochschild cohomology of block algebras and Happel's property

Patrick Serwene, Constantin-Cosmin Todea

In this short research note we obtain a reduction theorem for the non-vanishing of the first Hochschild cohomology of block algebras of finite groups with non-trivial defect groups…

Equivariant Hochschild cohomology of group algebras and relative Ext

Reduction theorems for a conjecture on basis in source algebras of blocks of finite groups

A reduction theorem for non-vanishing of Hochschild cohomology of block algebras and Happel's property

Equivariant Hochschild cohomology of group algebras and relative $Ext$