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math.RT2026
Outer derivations on blocks of group algebras
Benjamin Briggs, Lleonard Rubio y Degrassi
Let be a finite group whose order is divisible by the characteristic of a field . If is a block of with defect group , we prove that the space of derivations on…
math.RT2024
On the first relative Hochschild cohomology and contracted fundamental group
Jonathan Lindell, Lleonard Rubio y Degrassi
In this paper we investigate the Lie algebra structure of the first relative Hochschild cohomology and its relation with the relative notion of fundamental group. Let be fini…