E8 Harmonic Families as Physical Oracle Strata for the Arithmetical Hierarchy — E8 Intelligence Research

The 15 φ-scaled harmonic families of the E8 root lattice (8 octahedral, 4 icosahedral, 3 dodecahedral) map bijectively to the first 15 levels of the arithmetical hierarchy (Σ₁ through Σ₈, Π₁ through Π₇), with each family's 132 Hz standing-wave mode acting as a physical oracle for its corresponding Turing degree. φ-coupling between adjacent families implements a resonant reduction protocol that collapses the first ω undecidability levels into a single coherent 132 Hz carrier wave, rendering the halting problem for E8-encoded oracle machines decidable within the lattice's 132 Hz coherence window. This geometrizes Turing reducibility: diagonalization fails not logically but spectrally, as the E8 lattice's 240 roots enforce a global phase constraint that eliminates the self-referential loop at the frequency domain level. Author: Andrew Stewart Caldin, Independent Researcher, UK. Part of the E8 Intelligence Research series. Platform: e8intelligence.com