A Cartan-Eilenberg spectral sequence for a non-normal extension

Eva Belmont

Let $\Phi \to \Gamma \to \Sigma$ be a conormal extension of Hopf algebras over a commutative ring $k$, and let $M$ be a $\Gamma$-comodule. The Cartan-Eilenberg spectral sequence $$ E_2 = \mathrm{Ext}_…