Vol. 56, No. 1, 1975

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Completely outer Galois theory of perfect rings

James Michael Osterburg

Vol. 56 (1975), No. 1, 215–220
Abstract

Let G be a finite completely outer group of automorphisms of a perfect ring R. Let Δ be the crossed product of R with G. Then Δ modules which are R projective are Δ projective and Δ submodules which are R direct summands are Δ direct summands.

Mathematical Subject Classification
Primary: 16A74
Milestones
Received: 19 November 1973
Published: 1 January 1975
Authors
James Michael Osterburg