14 citations · 23 across the 7 of their papers we have counts for
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math.SP2016
On the Bonsall cone spectral radius and the approximate point spectrum
Vladimir Müller, Aljoša Peperko
We study the Bonsall cone spectral radius and the approximate point spectrum of (in general non-linear) positively homogeneous, bounded and supremum preserving maps, defined on a m…
math.FA2016
Circles in the spectrum and the geometry of orbits: a numerical ranges approach
Vladimir Muller, Yuri Tomilov
We prove that a bounded linear Hilbert space operator has the unit circle in its essential approximate point spectrum if and only if it admits an orbit satisfying certain orthogona…