Seam edge fourpoint
v448_seam_edge_fourpoint.py · frontier
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SEAM.EQUIV.EDGE.FOURPOINT.01: pinning the ONE external MMST fact empirically -- the edge FOUR-point is quasi-free and conformally convergent, extending v444's two-point scaling limit. [E] QUASI-FREE/WICK: the ground-state correlation matrix is an exact projector G^2=G (~1e-13), so the state is quasi-free and all n-point are Wick sums -- the MMST quasi-free CAR hypothesis (ledger entry 5) literally holds (structural: the BdG state is free). [E] FOUR-POINT CAUCHY CONVERGENCE: the edge four-point cross-ratio Q=[G01 G23]/[G02 G13] at commensurate positions (1,2,4,7)*(Nx/12) is Cauchy-convergent (spread shrinks, Nx=36..60). [E] CONFORMAL FOUR-POINT: Q converges to the free-fermion conformal cross-ratio sin(5pi/12)/sin(pi/12)=2+sqrt(3)~3.732 (eta=1). [E] BULK NEG CONTROL: the bulk four-point is orders of magnitude off (exponential). [C] the one external MMST fact (continuum existence) is now empirically supported at BOTH 2-point (v444) and 4-point order; SEAM.EQUIV.01 stays [O]. Python-only (numpy).
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