International Journal of Mathematics and Mathematical Sciences
Volume 11 (1988), Issue 2, Pages 401-402
doi:10.1155/S0161171288000468
A convex operator function
Derming Wang
Department of Mathematics and Computer Science, California State University, Long Beach, Long Beach 90840, California, USA
Abstract
It is shown that inversion is a convex function on the set of strictly positive elements of a C*-algebra.