3 papers
gr-qc2026
Universality in static spherically symmetric solutions of f(R) gravity
Valery I. Zhdanov
f(R) gravity is a well-known modification of General Relativity, that can be reduced to a scalar-tensor theory by a conformal transformation (Einstein frame). We study static spher…
gr-qc2025
Static spherically symmetric solutions of the f(R) gravity
V. I. Zhdanov
Static spherically symmetric (SSS) solutions of f(R) gravity are studied in the Einstein frame. The solutions involve SSS configuration mass M and scalaron mass (in geometrize…
gr-qc2025
Penrose hypothesis and instability of naked singularities in static spherically symmetric systems with scalar fields
A. V. Tugay, V. I. Zhdanov, Yu. V. Taistra
General relativistic static spherically symmetric (SSS) asymptotically flat configurations with scalar fields typically contain naked singularities at the center. We consider minim…