The zero-level centralizer in endomorphism algebras
Abstract
For an endomorphism f∈EndM) of a left R-module M we investigate the structure and the polynomial identities of the zero-level centralizer Cen0(f) and the factor Cen(f)/Cen0(f). A double zero-centralizer theorem for Cen0(Cen0(f)) is also formulated.
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