Symmetric Banach *-algebras: invariance of spectrum
Volume 141 / 2000
Studia Mathematica 141 (2000), 251-261
DOI: 10.4064/sm-141-3-251-261
Abstract
Let A be a Banach *-algebra which is a subalgebra of a Banach algebra B. In this paper, assuming that A is symmetric, various conditions are given which imply that A is inverse closed in B.
