Front matter

Figure fig:scope-XVI-N, Figure fig:split-XVI-N, Figure fig:chain-XVI-N, Figure fig:pair-XVI-N, and Figure fig:gate-XVI-N name the stop. Not a proof, and not an admission of a quantum coefficient.

Scope of this revision. The massless obstruction is conditional on Route A. Route B is not claimed discharged. Arbitrary prescribed $m>0$ remains unresolved. The certified interval $0\le m<1.3715\times 10^{-4}$ is not that arbitrary-mass statement. N-Ins.4 stays unresolved as a universal completion. The prepared theory is not a BV complex. XV-B is not opened. The stops at H2, I3, and J2 remain unresolved. This sheet does not repair X-G or XI-G. No quantum coefficient is admitted.