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math.RT2019
Character triples and equivalences over a group graded G-algebra
Andrei Marcus, Virgilius-Aurelian Minuta
We introduce Morita and Rickard equivalences over a group graded G-algebra between block extensions. A consequence of such equivalences is that Späth's central order relation holds…
math.RT2019★ 5 cited
Group graded endomorphism algebras and Morita equivalences
Andrei Marcus, Virgilius-Aurelian Minuta
We prove a group graded Morita equivalences version of the "butterfly theorem" on character triples. This gives a method to construct an equivalence between block extensions from a…