A Structural Perspective on the Yang–Mills Mass Gap Problem within the CoreLumen / Fiber–Defect Framework

This work develops a structural perspective on the Yang–Mills mass gap problem within the CoreLumen / Fiber–Defect framework, extending the viewpoint previously introduced for the Navier–Stokes equations. Rather than focusing on technical derivations, spectral analysis, or proof-level arguments, the paper emphasizes how the mass gap question is reorganized once defect formation and non-generation are treated as central structural mechanisms. The discussion is intended to clarify interpretation and usage of the Fiber–Defect language in the Yang–Mills setting. No claim of analytical proof, spectral resolution, or completion of the Clay Yang–Mills mass gap problem is made.