Inner-horizon blueshift coordinate
= Inner-horizon blueshift coordinate
{title2=$V_-\propto-e^{-\kappa_-v}$}
Near a nondegenerate outgoing inner <Cauchy horizon>, a regular null coordinate behaves as $V_-\propto-e^{-\kappa_-v}$, where $\kappa_->0$ is the magnitude of the inner-horizon <surface gravity>. Transforming stress components gives $T_{V_-V_-}\propto e^{2\kappa_-v}T_{vv}$. Even a small power-law tail can therefore cause an unbounded locally measured flux, motivating <mass inflation>.