P2 weights deligne bg
v499_p2_weights_deligne_bg.py · core
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P2.TYPING.01: the P2 weight-typing postulate HARDENED (the v491 check-9 residual) -- the anchor a = (1,1,2) typed as the Birkhoff-Grothendieck splitting exponents of the DELIGNE CANONICAL EXTENSION E of the flavor connection. Given the [E] anchors (4 marks v216, rank 3 v137, cusp class + irreducibility v117, (U)): deg E = -4 AS THEOREM (residue spectrum {0,1/3,2/3} unique in [0,1), trace 1 per mark x 4 marks; par-deg 0; infinity apparent, monodromy product = 1 exactly); POSITIVITY AS THEOREM (irreducibility exact: |<U,M0>| = 24 = |S4|, sum |chi|^2 = 24; + (U) => Mehta-Seshadri stability => h^0(E) = 0, all 324 saturation cases; BG dictionary h^0 = 0 <=> a_i >= 1); INTEGRALITY = Birkhoff-Grothendieck, automatic once E is a bundle. UNIQUENESS + SELECTOR: {1,1,2} unique (v491); Schur-Horn permutohedron integer points exactly {(2,2,0),(2,1,1)} and h^0 = 0 kills {0,2,2} -- the tfpt_2 'balanced' heuristic now TYPED as stability. h^1 DISCREPANCY REAL + RESOLVED: h^1(E) = 1 != 3 -- 'generations = H^1(E)' is FALSE (forcing it: deg -6, uniqueness lost, e2 in {9,11,12} never 5); two-object typing: L = O(-D) carries the generations (h^1(L) = 3 = N_fam = v137 basis), E carries them as its FIBER. BISWAS EXPLICIT (independent witness): Z3 cusp cover y^3 = (z-1)(z-i)(z+1)^2(z+i)^2, genus 2 (NOT the pillowcase double, genus 1 j = 1728 = deck side); p_* O_Y = O + O(-2)^2; the regular-rep model lands on {0,2,2} = the UNSTABLE Schur-Horn companion (h^0 = 1): integrality + sum rule COME OUT of the correspondence, stability is the selector. Negative controls: no positivity -> 4/31 solutions; deg -3/-5 breaks; n-mark scan e2 = (n-2)(n+1)/2 = 5 ONLY at n = 4; MS-rational e2 = 16/3, 44/9. [C]/[N] residuals: R1 module identification (QGEO.SYM stays [O]); R2 unitarity (U) (v33/v40); R3 analytic monodromy [N] (v117 check 4). P2 stays an axiom (AX.P2.01 declared, no marker moves); non-circular (no v23/v115 splitting input). Exact (sympy); Wolfram-mirrored.
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