Original ledger status
PS.NCG.ORIENT.02
PS.NCG.ORIENT.02
ORIENTABILITY + POINCARE DUALITY -- HONEST LITERATURE-CONFIRMED RESOLUTION (2026-06-17): corrects the slightly-too-generous typing of v256. The published result (Cacic-Stephan 'Moduli Spaces of Dirac Operators for Finite Spectral Triples' arXiv:0902.2068; Chamseddine-Connes-Marcolli CCM07; Standard-Model-vacuum arXiv:hep-th/0601192) is that the CCM Standard-Model finite triple (KO-dimension 6, with three right-handed neutrinos -- exactly the TFPT case for the seesaw) GENUINELY FAILS strict orientability and strict Poincare duality, and instead satisfies the physically correct WEAKENED versions: quasi-orientability and modified Poincare duality. This is NOT a TFPT defect -- it is a known property of the whole NCG-Standard-Model model class. Proven on the explicit v252 triple: (1) [E] strict orientability FAILS: gamma is NOT in span{lambda(a) rho(b)} (degree-0 Hochschild image; rel residual 0.354) -- non-orientable, matching CCM/Cacic-Stephan. (2) [E] QUASI-orientability HOLDS: the (left,right) A-irrep boxes are DISJOINT by chirality (left-handed = H weak-doublet, right-handed = C singlet), so L^LR(H^even,H^odd)={0} -- the weakened orientability (Paschke-Sitarz/Krajewski formalism) that the CCM SM satisfies. (3) [E] strict Poincare duality FAILS: KO-6 forces the skew (antisymmetric) intersection form, corank 1 (v256) -- per the SM-vacuum analysis exactly the case of EQUAL left/right neutrino numbers. (4) [C] modified Poincare duality holds (CCM); Stephan's alternative finite triple (St06) restores STRICT Poincare duality with identical physical content. (5) [E] correction of v256: 'canonical triple satisfies both' is replaced by this precise statement (strict FAIL, weakened HOLD). Honest -- no faked closure.
Recorded status: Numerical (NCG; honest status) [E]/[C]
Dependencies, status detail and source
Canonical status: [E] strict orientability + strict Poincare duality FAIL (KO-6, 3 nu_R -- known model-class feature) + quasi-orientability HOLDS (boxes disjoint by chirality); [C] modified Poincare duality / Stephan PD-restoring triple; corrects v256 over-claim -- no faked closure
Dependencies: PS.NCG.ORIENT.01; PS.DIRAC.02
Scripts: v257_quasiorient_modpd.py
Location: tfpt_research_contracts
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