Calibrating R(Dst)

Propagation in the Cohesion Unified Field Theory is not governed by a universal constantbut by the local recursion-rate resistance of the substrate. This resistance is encoded inthe density-dependent propagation function R(Dst), where Dst is the normalised densitystate variable defined relative to the inherited pressure Ps+1. This paper formalises Dst,derives the general geometric constraints on R(Dst), restates the asymptote theoremfrom the pressurised-universe framework 3 in the specific context of R(Dst), andoutlines a calibration methodology using solar-system and cosmological observations.The functional form of R(Dst) is left general; only the geometric constraints are derivedhere. The high-density limit of R(Dst) must reproduce general relativity, established asthe correct description in that regime 4. Quantitative predictions — redshift, lensing,propagation delay, and large-scale structure — follow once R(Dst) is calibrated againstmulti-scale observational data. This paper defines the mathematical and geometricframework required for that calibration.