The BCT Superfluid Lattice Model derives 259+ observable quantities from three geometric inputs and zero free parameters. Volume 18 presents seven Letters from the BCT programme written at the level of a curious child and the accessibility of a very tired physicist. The physics is identical to the full technical programme. Includes full index and plain-language glossary of all technical terms, defined simply and precisely. Seven Letters: The Cockatoo Who Solved the Universe (fine structure constant) ; The Bee Who Knew the Secret (OHC Bessel resonance 349. 7 Hz) ; The Gecko Who Walked on Walls (spatula = rₒct × ℓP) ; The Spider's Invisible Harp (NEW Prediction #266: Pholcid web resonance 87. 4/174. 8 Hz) ; The Bell That Answered (cathedral bell partials = BCT Bessel ratios) ; The Star That Remembered (carbon geometric necessity) ; The Beaver's Blueprint (dam ratio = RBCT = 1. 843). New prediction introduced: Prediction #266 — Pholcus phalangioides web primary resonance frequencies = OHC Bessel subharmonics j₀, ₁/4 = 87. 4 Hz and j₀, ₁/2 = 174. 8 Hz. Observed: ~87 Hz and ~175 Hz. Error <1%. Zero free parameters. Three inputs: rₒct = (√2−1) /2, rₜet = (√6−2) /4, ΛQCD = 220 MeV. Zero free parameters.
Michel Robert Cabrié (Wed,) studied this question.