2026-06-19 (Route A's last hypothesis discharged: the gapped quasi-free bulk is invertible by the free-fermion classification, v301)
Research changelog · TFPT — Introduction and reading guide
v301_route_a_invertible.py attacks the single remaining unconditional gap of SEAM.EQUIV.01. Since v300 collapsed Route B into Route A's rationality, that gap is Route A's open hypothesis ( v297 LIT-A): ``the raw quasi-free seam bulk is invertible (SRE)''. A gapped free-fermion (Gaussian) [formula in source] D bulk cannot carry intrinsic topological order — free fermions give the integer (IQHE/Chern) phases, all inver
Opening source excerpt. Formulas and the full argument remain in the original document.
Source location and explicit evidence links
documents/changelog/sections/017-source.tex · lines 152 to 170
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