Front matter

Figure fig:split-XVI-A records one view of the same separation. Figure fig:chain-XVI-A records one view of the same separation. Figure fig:pair-XVI-A records one view of the same separation. Figure fig:gate-XVI-A records one view of the same separation. The drawings add no hypothesis.

Figure fig:scope-XVI-A records that separation. The drawing adds no hypothesis.

{ {0.92} Scope and release status. Throughout, the regulator width satisfies $\epsilon >0$ and is held fixed. Neither X-G nor XI-G is repaired here. The new retarded coefficient remains Unresolved. The displayed coefficient slots are schematic and are not an identity. A missing estimate is not a proof of obstruction. A verified estimate for one operation is not, by itself, construction of a retarded quantum product. }