V.D337 — Algebraic–PDE Split for Rotation Curves

Honest two-layer assessment. Algebraic (τ-effective): shape (K₀), amplitude (v⁴=GMa₀), fit (20 galaxies 0.067 dex), interpolation (μ_τ derived). PDE (conjectural): nonlinear τ-Einstein unsolved, linearized 4 OOM gap, cocycle amplification blocks perturbation.