Sabbir Rahman

Global Continuation Across the Kerr Ring: Axiom Sets, Junction Data, and Disk-Crossing Geodesics

With the stationary Killing field continued from $r>0$, the fixed-$M$ Boyer--Lindquist continuation of Kerr has a second asymptotically flat end with ADM mass $-M$. We separate this metric statement from signed Komar conventions and organize the data required for other continuati...

Looking-Glass Relativity: Orientation-Gauge Geometry and a Symmetric Extension of the Equivalence Principle

The analytic Kerr continuation across its regular central disk yields two asymptotic descriptions whose masses have opposite signs relative to a single continued stationary generator. We seek a completion in which neither description is privileged: transport may reverse the local...