Comment on "Generic rotating regular black holes in general relativity coupled to non-linear electrodynamics"

TL;DR

This paper identifies an inconsistency in previous rotating regular black hole solutions coupled with non-linear electrodynamics and proposes an algorithm to generate new, consistent solutions.

Contribution

It highlights a flaw in earlier solutions and introduces a systematic method to derive valid rotating regular black hole solutions in this context.

Findings

Identified inconsistency in prior solutions

Developed an algorithm for new solutions

Provided corrected classes of rotating black holes

Abstract

We show that there is an inconsistency in the class of solutions obtained in Phys. Rev. D {\bf 95}, 084037 (2017). This inconsistency is due to the approximate relation between lagrangian density and its derivative for Non-Linear Electrodynamics. We present an algorithm to obtain new classes of solutions.