Object. Normalized kernel-annihilation residual.
Identity. $r_{KP,\mathrm{norm}}=\|KP\|_F/(\|K\|_F\|P\|_F)\le 10^{-12}$.
Parents. E47-KERNEL-47 ยท E47-PROJECTOR.
Witness. PF-20260913-SPEC-13.