Original ledger status
HOR.NARIAI.02
HOR.NARIAI.02
THE ONE-LINE NARIAI ENTROPY BOUND (external-review proposal 2026-06-14): the SdS entropy ratio S_tot/S_dS = (x^2+1)/Phi3(x) (x=r_b/r_c; Phi3=x^2+x+1 the N_fam=3 cyclotomic; HOR.NARIAI.01) satisfies S_tot >= (2/3) S_dS with equality exactly at the Nariai merge x=1, via the perfect square 3(x^2+1)-2*Phi3(x)=(x-1)^2 >= 0 -- a variation-free proof of the entropy floor (the global minimum on x>0 is 2/3=|Z2|/N_fam). Consistent with d/dx=(x-1)(x+1)/Phi3^2 vanishing at x=1. Exact; Wolfram-mirrored
Recorded status: Identity [E] (exact variation-free entropy bound)
Dependencies, status detail and source
Canonical status: Identity [E]: S_tot/S_dS >= 2/3 via (x-1)^2 >= 0, equality at the Nariai merge
Dependencies: HOR.NARIAI.01; v101_horizon_anchor.py; v8_horizon.py
Scripts: v190_nariai_entropy_bound.py
Location: tfpt_horizon_readouts
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