Frozen sheet

The coordinate prescription, density coefficients, and complete two-jet gauge law are copied from X-A.tex XA; the bare tests, multiplet Wick algebra, and fixed-regulator admission from X-B-v3.tex XB; the completed tests, recursion, and fixed-regulator identity from X-C-v3.tex XC; the separation sheet and explicit equation-ideal representatives from X-D-v3.tex XD. Their proofs are not repeated.