Idempotents dans les algèbres de Banach
Tom 120 / 1996
Studia Mathematica 120 (1996), 155-158
DOI: 10.4064/sm-120-2-155-158
Streszczenie
Using the holomorphic functional calculus we give a characterization of idempotent elements commuting with a given element in a Banach algebra.
