This work introduces Route Coherence under Inequality (RCI), a permutation-calibrated metric designed to evaluate whether a single functional mapping from baryonic observables to galaxy rotation curves remains stable across intrinsically unequal galaxies. RCI complements per-galaxy goodness-of-fit statistics by penalizing cross-galaxy incoherence while preserving within-galaxy fidelity. The metric is demonstrated on a well-defined subset of the SPARC database and applied to benchmark models (NFW halos and MOND), revealing distinct coherence profiles. This release includes the full manuscript, appendices, and reproducibility plan.
Jorge Vasconcelos (2026) studied this question.