Many evolution problems in physics are described by partial differential equations on an
infinite domain; therefore, one is interested in the solutions to such problems for a given …

We describe the hyperboloidal compactification for Teukolsky equations in Kerr spacetime.
We include null infinity on the numerical grid by attaching a hyperboloidal layer to a compact …

Strong gravitational lensing occurs when photons pass through the vicinity of a black hole.
We investigate this phenomenon in the context of a gravitational-wave event, specifically …

We review the Debye potentials formalism for an electromagnetic test field on a fixed
vacuum type D background and extend it in two different directions.(a) We show how to …

The Teukolsky master equation—a fundamental equation for test fields of any spin, or
perturbations, in type D spacetimes—is classically treated in its separated form. Then the …

Práce seznamuje čtenáře s tetrádovými přístupy v obecné teorii relativity (OTR), jmenovitě s
Newman-Penroseovým (NP) aa Geroch-Held-Penroseovým (GHP) for-malismem. Ty jsou …