Purpose and attribution

The analytical source records are Cheung's X-B, version 3, and X-B-ii, version 1 XB,XBii. The first constructs one normalized scalar response; the second clarifies its scope, one-contraction boundary, and normalization. The present manuscript transfers that package to the supported presentation supplied in X-A-ST XAST. It does not enlarge the source's quantum field content.

The distinction between a classical relational coefficient and its quantum admission is essential. A classical identity does not define a distributional product, while an admitted free-field expression does not automatically define an interacting response. The standard perturbative algebraic framework makes these domain distinctions explicit FR,DFreference,BF.