linear_phase_justification
plain-language theorem explainer
Linear phase accumulation in the Recognition Science ledger follows from J-cost normalization with second derivative J''(1) equal to 1, so each tick k contributes phase proportional to its index. Researchers closing the physical motivation gap for 45-tick synchronization in the eight-tick octave would cite this definition. It assembles the rationale as a concatenated string from symmetry and cumulative accounting without lemmas or tactics.
Claim. J-cost symmetry gives $J''(1)=1$, so cumulative phase over a closed cycle of 9 steps is the triangular sum $T(9)=45=9(10)/2$.
background
The module supplies physical motivation for the 45-tick synchronization that closes the dimension-forcing argument. The 8-tick cycle (period 2^D with D=3) is not closed by itself; a closure step yields 9 steps total, by the fence-post principle. Cumulative phase is then the triangular number T(n) = sum k from 1 to n = n(n+1)/2, so T(9)=45. J-cost is the functional J(x)=1/2(x + 1/x)-1 whose second derivative at equilibrium is normalized to 1. The tick is the fundamental time quantum tau_0=1. The eight-tick phase is defined as k pi /4 for k in Fin 8.
proof idea
Direct string definition that concatenates three explanatory sentences on J-cost symmetry, near-equilibrium deviations, and ledger accounting, followed by a comment block deriving the Fibonacci link from the triangular formula at n=9. No lemmas are invoked and no tactics are used.
why it matters
This definition supplies the missing physical grounding for the 45-tick synchronization inside the Gap45 module, addressing the explicit gap in the dimension-forcing chain at T8 (D=3). It rests on the eight-tick phase and tick quantum from upstream, and supports the closure principle required for ledger neutrality. No downstream theorems depend on it yet, leaving open the question of embedding the string into a formal ledger-neutrality theorem.
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