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In this article we describe the formulation of null geodesics as nullconformal geodesics and their description in the tractor formalism. A conformalextension theorem through an isotropic singularity is proven by requiring theboundedness of the tractor curvature and its derivatives to sufficient orderalong a congruence of null conformal geodesic. This article extends earlierwork by Tod and Luebbe.

A Conformal Extension Theorem based on Null Conformal Geodesics