References

XA

N. Cheung. {Landmark X-A: Classical covariance of one fixed-regulator switched relational scalar through order ${\kappa }^2$}. Supplied manuscript X-A.tex. Classical coordinate prescription, density coefficients, kernel identity, covariance, and analytic diagnostics.

XB

N. Cheung. Landmark X-B: Fixed-regulator admission and one retarded correction for the ramp relational scalar, with the metric kept classical. Supplied manuscript X-B-v3.tex. Bare tests, scalar algebra and quotient topology, off-shell warning, and regulator-estimate boundary.

XC

N. Cheung. Landmark X-C: The missing second-order retarded maps for the ramp relational scalar, with the metric kept classical. Supplied manuscript X-C-v3.tex. Completed tests, Yang–Feldman recursion, variation, fixed-regulator identity, and sourced evaluation.

VIIC

Landmark VII-C: A mixed-Wick obstruction to a normal-topology boundary extension for sharp Cauchy harmonic insertions. Supplied manuscript VII-C.tex. The Normal-topology Wick extension assumption ass:extension, hypotheses (E1)–(E4), and the named mixed-triple obstruction. Used for comparison only.

BGP

C. Bär, N. Ginoux, and F. Pfäffle. Wave Equations on Lorentzian Manifolds and Quantization. ESI Lectures in Mathematics and Physics. European Mathematical Society, 2007. arXiv:0806.1036. Chapter 3 supplies Cauchy and Green-operator facts; Theorem 3.4.7 supplies the exact sequence used for the linear free-field quotient.