[SUPERSEDED] Resolution of the V_{ub} Discrepancy: Three-Subspace Crossing Suppression in the CKM Matrix

SUPERSEDED This paper has been superseded by Appendix P of "The Emergence Canvas Model: A Unified Framework for Fundamental Physics - The Machine and the State" (2026), https://doi.org/10.5281/zenodo.20795774 which presents the correct derivation of the V_ub suppression factor in clean, final form. The central result — V_ub = λ³ · T₁/(T₁+T₂) = λ³/3 ≈ 0.0036, matching the observed value 0.00361 ± 0.00030 — remains correct. The physical interpretation (three-subspace crossing suppression, with the projection factor 1/3 representing the U(1) fraction of the electroweak subspace) is preserved in the superseding treatment. This paper is retained for archival purposes only. Please cite Appendix P of the main Canvas Model paper for the definitive derivation.