Spectrum and convergence of eventually positive operator semigroups

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

Abstract

An intriguing feature of positive C-semigroups on function spaces (or more generally on Banach lattices) is that their long-time behaviour is much easier to describe than it is for general semigroups. In particular, the convergence of semigroup operators (strongly or in the operator norm) as time tends to infinity can be characterized by a set of simple spectral and compactness conditions. In the present paper, we show that similar theorems remain true for the larger class of (uniformly) eventually positive semigroups—which recently arose in the study of various concrete differential equations. A major step in one of our characterizations is to show a version of the famous Niiro–Sawashima theorem for eventually positive operators. Several proofs for positive operators and semigroups do not work in our setting any longer, necessitating different arguments and giving our approach a distinct flavour.

Details

Original languageEnglish
Pages (from-to)791–811
Number of pages21
JournalSemigroup Forum
Volume103
Issue number3
Publication statusPublished - 2021
Peer-reviewedYes

External IDs

Scopus 85111339483

Keywords

Keywords

  • C_0-semigroup, eventual positivity, spectrum, asymptotics