A geometric condition equivalent to commutativity in Banach algebras

Instytut Matematyczny Polskiej Akademii Nauk / Institute of Mathematics / Publishing house / Journals and Serials / Studia Mathematica / All issues

Ignacio Zalduendo Studia Mathematica 94 (1989), 187-192 DOI: 10.4064/sm-94-2-187-192