We derive the Wolfenstein A parameter as the face-spectral complement of the lower T₁u eigenvalue: A = (F−r₁) /F = (19+√17) /28 = 0. 82583, where F = 14 is the face count and r₁ = (9−√17) /2 is the left-handed T₁u eigenvalue. This resolves the previous −1. 1σ tension to −0. 015σ. The formula has a direct physical interpretation: the fraction r₁/F is the spectral weight of the first-generation (left-handed) eigenvalue on the face graph, and A is the remaining fraction available for second-generation mixing. Combined with Papers #51 and #64, all four Wolfenstein parameters (λ, A, ρ̄, η̄) are now derived from cell integers at better than 0. 4σ individual tension. Part of the Unified Foam Field Theory series. Priority date: 20 February 2026. This paper closes the NLO Wolfenstein programme: combined with Paper #51 (NLO λ), Paper #64 (NLO ρ̄), and Paper #67 (NLO η̄/δCKM), all four Wolfenstein parameters are now derived from cell integers at better than 0. 4σ individual tension. Independently verifiable; see companion repository at https: //github. com/WebEnvy/UnifiedFoamFieldTheory.
Luke Martin (Fri,) studied this question.