Abstract
In this article we prove that if S is a faithfully projective R-algebra and H is a finite inverse semigroup acting on S as R-linear maps such that the fixed subring S H = R, then any partial isomorphism between ideals of S which are generated by central idempotents can be obtained as restriction of an R-automorphism of S and there exists a finite subgroup of automorphisms G of S with S G = R.
2000 Mathematics Subject Classification:
ACKNOWLEDGMENT
This article was partially supported by CNPq and FAPERGS (Brazil).
Notes
Communicated by R. Wisbauer.