2026-05-15 · High · C7
ERRATUM-005 · Book V QNM and ringdown terminology correction
Corrects QNM and ringdown public language. The Kerr primary ringdown depends on remnant mass and spin; the tau prediction is the leading-order T² ratio f_(0,1)/f_(1,0)=ιτ^-1. The former echo/no-echo language is split into two categories: no exotic reflective-surface ECO echoes, but released T² cycle-delay/ringdown observables remain as topology-readout candidates. It also repairs generated-page contamination on QNM and cycle-delay prediction/falsification pages.
Correction. Update Book V source text, TauLib comments/projection labels, Corpus registry/results data, and public pages so QNM ratio direction, cycle-delay ratio direction, and echo terminology are consistent. Remove CKM/Wolfenstein and proton-radius bleed-through from QNM and cycle-delay pages. Public status remains released-corrected, not hidden or validated.