Sums of idempotents and a lemma of N. J. Kalton
Tom 121 / 1996
Studia Mathematica 121 (1996), 185-192
DOI: 10.4064/sm-121-2-185-192
Streszczenie
A lemma of Gelfand-Hille type is proved. It is used to give an improved version of a result of Kalton on sums of idempotents.
