Spectrally isometric elementary operators
Tom 236 / 2017
Studia Mathematica 236 (2017), 33-49
MSC: Primary 47B47; Secondary 46H99, 47A10, 47A65, 47B48.
DOI: 10.4064/sm8538-6-2016
Opublikowany online: 7 September 2016
Streszczenie
We present criteria for unital elementary operators (of small length) on unital semisimple Banach algebras to be spectral isometries. The surjective ones among them turn out to be algebra automorphisms.
