3 papers
gr-qc2026
Optical Landscapes and High-Energy Collisions in Hairy Horndeski Gravity
Filipe Cattete Alves, Rodrigo Maier
We investigate the null geodesic structure, photon sphere dynamics, and high-energy particle collisions within a class of static, spherically symmetric hairy Horndeski black holes.…
math.NA2024
A computational study of algebraic coarse spaces for two-level overlapping additive Schwarz preconditioners
Filipe A. C. S. Alves, Alexander Heinlein, Hadi Hajibeygi
The two-level overlapping additive Schwarz method offers a robust and scalable preconditioner for various linear systems resulting from elliptic problems. One of the key to these p…
gr-qc2024
Scalar Perturbations in Nonsingular Universes from Interacting Vacuum
Filipe Cattete Alves, Rodrigo Maier
In this paper we examine the stability of scalar perturbations in nonsingular models which emerge from an interacting vacuum component. The analysis developed in this paper relies…