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math-ph2015★ 7 cited
A note on invariant temporal functions
Olaf Müller
The purpose of this article is to present a result on the existence of Cauchy temporal functions invariant by the action of a compact group of conformal transformations in arbitrar…
math-ph2014★ 9 cited
Lorentzian Spectral Geometry for Globally Hyperbolic Surfaces
Felix Finster, Olaf Müller
The fermionic signature operator is analyzed on globally hyperbolic Lorentzian surfaces. The connection between the spectrum of the fermionic signature operator and geometric prope…