49 citations · 240 across the 26 of their papers we have counts for
32 papers
Closed and broken electromagnetic orbits in Kerr--Newman spacetime
Erasmo Caponio, Giulio Sanzeni, Stefan Suhr
We study future-pointing timelike solutions of the Lorentz force equation in the sub-extremal Kerr--Newman spacetime, with special attention to the time-machine region $\mathfrak T…
On homotopy properties of solutions of some differential inclusions in the -topology
Erasmo Caponio, Antonio Masiello, Stefan Suhr
We consider a differential inclusion on a manifold, defined by a field of open half-spaces whose boundary in each tangent space is the kernel of a one-form. We make the assumption…
Lorentzian metric spaces and their Gromov-Hausdorff convergence
E. Minguzzi, S. Suhr
We present an abstract approach to Lorentzian Gromov-Hausdorff distance and convergence, and an alternative approach to Lorentzian length spaces that does not use auxiliary ``posit…
A Riemannian plane with only two injective Geodesics
Victor Bangert, Stefan Suhr
We present an example of a complete Riemannian plane with precisely two injective geodesics - up to reparameterization. The example arises as a perturbation of a surface of revolut…
Existence of complete Lyapunov functions with prescribed orbital derivative
Peter Giesl, Sigurdur Hafstein, Stefan Suhr
Complete Lyapunov functions for a dynamical system, given by an autonomous ordinary differential equation, are scalar-valued functions that are strictly decreasing along orbits out…
Causal simplicity and (maximal) null pseudoconvexity
Jakob Hedicke, Ettore Minguzzi, Benedict Schinnerl +2
We consider pseudoconvexity properties in Lorentzian and Riemannian manifolds and their relationship in static spacetimes. We provide an example of a causally continuous and maxima…