The Mittermeier RG Attractor as the Essential Renormalization-Group Skeleton of MAT: Closed Two-Threshold Normal Forms from the Euler-Mascheroni Constant γ_E, the Plastic Constant ρ, and π; locked three-channel architecture built from a geometric residue channel, an amplitude channel, and a vacuum channel; downstream vacuum hierarchy, closure-first cosmology, and microscopic lift

Mittermeier Attractor, Mittermeier Attractor Theory, MAT, renormalization group, functional renormalization group, quantum gravity, asymptotic safety, RG skeleton, three-channel emergence, exact 3C reconstruction, synchronized vacuum flow, exact back-integration, two-threshold normal form, plastic constant, Euler-Mascheroni constant, analytic invariants, vacuum hierarchy, late-time vacuum readout, closure-first cosmology, particle bridge, calibrated closure branch, π-dual manifold, Planck-boundary constant, fine-structure coupling, uplift architecture, radiation budget, active Hubble branch, closure-first FRW semantics, vacuum-scale readout, matter-vacuum closure