T. Guédénon

collaborators

2 papers

math.RA2026

Some homological resultsin the category of colour $(A, H)$ -Hopf modules

Thomas Guédénon

Let $k$ be a field, $H$ a colour Hopf algebra and $A$ a graded $H$ -comodule colour algebra. We give a sufficient condition for a colour $(A, H)$ -Hopf module to be injective as a…

math.RA2004

The relative Picard group of a comodule algebra and Harrison cohomology

S. Caenepeel, T. Guedenon

Let $A$ be a commutative comodule algebra over a commutative bialgebra $H$ . The group of invertible relative Hopf modules maps to the Picard group of $A$ , and the kernel is describ…

Some homological resultsin the category of colour (A,H)-Hopf modules

The relative Picard group of a comodule algebra and Harrison cohomology

Some homological resultsin the category of colour $(A, H)$ -Hopf modules