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R27 · Period resonance as a finite spectral problem (the endpoint)
RCHM × Hodge Research Round
R27 · Period resonance as a finite spectral problem (the endpoint)
Küchle c5 Period Resonance as a Finite Spectral Problem: HLYY Boundary, 12 BWB Slots, and Ancestry-Relative Strong K3 Type
Reduces ρ_per to the generic rank of a finite Borel–Weil–Bott spectral differential (E1 page 15/68/48, Euler characteristic −5) and reports 12 HLYY 'resonance slots' for the H^{2,2} layer (the H^{3,1} layer passes); it explicitly does not claim ρ_per = 0.
R27 is the endpoint of the line: it reduces c5's period-realization problem to one explicit, still unresolved integer ρ_per.
The paper says 'Round 27 does not claim: rho_per=0' and calls this 'the strongest safe closure currently available'. The 12 slots and the E1 cells are a stored certificate; no generator or checker for the BWB/HLYY computation is shipped (the script header admits this; the paper does not say so).
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