3 papers
gr-qc2026
Black hole and wormhole branches in gravitational decoupling
Francisco Tello-Ortiz, Y. Gomez-Leyton, Vitalii Vertogradov +1
Minimal Geometric Deformation (MGD) applied to a static Schwarzschild black hole seed generates a single decoupler function , obtained by solving the -sector field equatio…
gr-qc2026
Horizon-regular cross-focusing and inner-horizon obstructions in spherical f(R) gravity
Maickol Muñoz-Palma, Francisco S. N. Lobo, Jean Báez Cuevas +1
We formulate a horizon-regular double-null criterion for regular inner marginal horizons in spherically symmetric metric gravity. Using normalized outgoing and ingoing radia…
gr-qc2026
Scalaron-modified null focusing and radial monotonicity in static f(R) gravity
Maickol Muñoz-Palma, Francisco S. N. Lobo, Jean Báez Cuevas +1
We derive an exact radial monotonicity law for static, spherically symmetric spacetimes in metric \(f(R)\) gravity. For \(ds^2=A(r)dt^2-dr^2/B(r)-r^2dΩ^2\), the matter contribution…