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*Semi *simplicity of *modules over *simple *rings.
(1980)
We state the definitions needed for a description of the thesis.
Brauer groups of H-dimodule algebras and truncated power series Hopf algebras.
(1980)
The Brauer group of H-dimodule algebras, BD(R, H), consists of equivalence classes of H-Azumaya algebras; where H is a Hopf algebra over a commutative ring R, and an H-dimodule algebra A is defined to be H-Azumaya if certain ...