Oscillatory null singularity inside realistic spinning black holes

We calculate the asymptotic behavior of the curvature scalar (Riemann)(2) n ear the null weak singularity at the inner horizon of a generic spinning bl ack hole, and show that this scalar oscillates an infinite number of times while diverging. The dominant parallel-propagated Riemann components oscill ate in a similar manner. This oscillatory behavior, which is a remarkable c ontrast to the monotonic mass-inflation singularity in spherical charged bl ack holes, is caused by the dragging of inertial frames due to the black ho le's spin.