25 citations · 97 across the 23 of their papers we have counts for
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math.FA2020★ 7 cited
Positive irreducible semigroups and their long-time behaviour
Wolfgang Arendt, Jochen Glück
The notion \emph{Perron-Frobenius theory} usually refers to the interaction between three properties of operator semigroups: positivity, spectrum and long-time behaviour. These int…
math.SP2020
Disjointness-preserving operators and isospectral Laplacians
Wolfgang Arendt, James B. Kennedy
All the known counterexamples to Kac' famous question "can one hear the shape of a drum", i.e., does isospectrality of two Laplacians on domains imply that the domains are congruen…