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This article investigates the phenomenon of mass inflation and its consequential impact on the stability of Cauchy horizons within the framework of general relativity. Mass inflation, defined by an exponential surge in energy, is pivotal in preserving causality across solutions like the Kerr black hole, ensuring the singular nature of causality-violating regions. Through a nuanced examination, the study expands the traditional understanding of mass inflation beyond stationary geometries to include dynamic black hole configurations. This exploration is enriched with a mathematical analysis of Schwarzschild and Kerr-Newman metrics, alongside a discussion on f (R) gravity's implications for black hole physics. The findings challenge existing paradigms, proposing new models that accommodate mass inflation, thereby inviting further inquiry into the interplay between general relativity, quantum mechanics, and f (R) gravity.
Wen-Xiang Chen (Wed,) studied this question.