ManifoldGeometryOps.point_norm_sq

t3toolbox.backend.geometry.ManifoldGeometryOps.point_norm_sq(x_cores)

def point_norm_sq(self, x_cores):

‖X‖²_HS – the regularizer’s objective term; per-element over the stack ``C`` (shape = C, a 0-d scalar unstacked). Exact for ANY point: left-orthogonalizes first (Tucker up-orth + one left TT sweep, no W factor – negligible beside the misfit evaluation it always sits next to), then reads ‖last TT core‖². The uniform twin does the same. The check-free fast path for a point known to be left-orthogonal is t3_left_orthogonal_norm_sq().