UCM Paper 33. Proves IR stability (θ = −1) of the collective membrane fixed point identified in Paper 32. Derives three exact couplings g₀² = 6/π, κ̃₀ = 1/(2π), αC = 3/2 from UCM substrate parameters. Rules out all perturbative derivations of X = 61.5 and reformulates Conjecture 2 as a non-perturbative conformal invariance condition.
Norbert Prebeck (2026) studied this question.