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math.RT2003
On blocks with cyclic defect group and their head orders
Gabriele Nebe
It is shown that Section 8 of Plesken's 1983 lecture notes describes blocks of cyclic defect group up to Morita equivalence. In particular such a block is determined by its planar…
math.RT2003★ 1 cited
On the radical idealizer chain of symmetric orders
Gabriele Nebe
If is an indecomposable, non maximal, symmetric order, then the idealizer of the radical $Γ:= \Id(J(Λ)) = J(Λ)^{#} $ is the dual of the radical. If is hereditary then h…