Computes restricted Lie algebra structure of H^1(B0(G), B0(G)) for finite-representation-type principal blocks of infinitesimal group schemes and deduces that complexity of trivial module k equals maximal toral rank of L.
Erdmann, Blocks of Tame Representation Type and Related Algebras
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On the first Hochschild cohomology of cocommutative Hopf algebras of finite representation type
Computes restricted Lie algebra structure of H^1(B0(G), B0(G)) for finite-representation-type principal blocks of infinitesimal group schemes and deduces that complexity of trivial module k equals maximal toral rank of L.