NULL WEAK SINGULARITIES IN PLANE-SYMMETRICAL SPACE-TIMES

We construct a class of plane-symmetric solutions possessing a curvatu re singularity that is null and weak, like the space-time singularity at the Cauchy horizon of spinning (or charged) black holes. We then an alyze the stability of this singularity using a rigorous nonperturbati ve method. We find that within the framework of (linearly polarized) p lane-symmetric space-times this type of null weak singularity is local ly stable. Generically, the singularity is also scalar curvature. Thes e observations support the new picture of the null weak singularity in side spinning (or charged) black holes, which is so far established pr imarily on the perturbative approach.