Browsing by Author "Del Rio, Angel"
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Actions of picard groups on graded rings
Haefner, Jeremy; Del Rio, Angel (Elsevier, 1999)No abstract found. -
The Globalization problem for inner automorphisms and Skolem-Noether theorems
Haefner, Jeremy; Del Rio, Angel (World Science, 2003-07)We investigate the circumstances under which an inner automorphism of a ring with local units can be built from “local” information. Specifically, we consider three natural “inner” type properties for an automorphism of ... -
The Isomorphism problem for incidence rings
Abrams, Gene; Haefner, Jeremy; Del Rio, Angel (University of California, 1999)Let P and P’ be finite preordered sets, and let R be a ring for which the number of nonzero summands in a direct decomposition of the regular module RR is bounded. We show that if the incidence rings I(P;R) and I(P’;R) ...