Abstract

Every Köthe echelon Fréchet space X that is Montel and not isomorphic to a countable product of copies of the scalar field admits a power bounded continuous linear operator T such that I − T does not have closed range, but the sequence of arithmetic means of the iterates of T converges to 0 uniformly on the bounded sets in X. On the other hand, if X is a Fréchet space which does not have a quotient isomorphic to a nuclear Köthe echelon space with a continuous norm, then the sequence of arithmetic means of the iterates of any continuous linear operator T (for which $(1/n)T^n$ converges to 0 on the bounded sets) converges uniformly on the bounded subsets of X, i.e., T is uniformly mean ergodic, if and only if the range of I−T is closed. This result extends a theorem due to Lin for such operators on Banach spaces. The connection of Browder’s equality for power bounded operators on Fréchet spaces to their uniform mean ergodicity is exposed. An analysis of the mean ergodic properties of the classical Cesàro operator on Banach sequence spaces is also given.

Autore Pugliese

• Albanese Angela Anna

Tutti gli autori

• A.A. Albanese , J. Bonet , W.J. Ricker

Titolo volume/Rivista

JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS

Anno di pubblicazione

2013

ISSN

0022-247X

ISBN

Non Disponibile

Numero di citazioni Wos

10

Ultimo Aggiornamento Citazioni

28/04/2018

Numero di citazioni Scopus

10

Ultimo Aggiornamento Citazioni

28/04/2018

Settori ERC

Non Disponibile

Codici ASJC

Non Disponibile