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Structural Selection
Definition T.2As stated in the manuscript — not independently proof-checked beyond the v2 audit

Definition T.2 — Inertial saturation

Formal statement

An excitation is said to be inertially saturated if any attempt to increase its propagation speed destroys phase coherence.

Mathematically:

v→ceff  ⟹  ddv⟨∣L∣⟩→0.\boxed{ v \to c_{\mathrm{eff}} \;\Longrightarrow\; \frac{d}{dv}\langle |L| \rangle \to 0. }

At saturation:

  • inertial storage ceases to increase,
  • effective inertia vanishes,
  • propagation becomes universal and frame-invariant.

This is precisely the operational meaning of “massless”.

Source

Appendix T: Light as Inertial Saturation — Why Massless Excitations Exist — Gravity as a Temporally Closed Dynamical Phase

Gravity as a Temporally Closed Dynamical Phase/34_Appendix T — Light as Inertial Saturation.tex

Revision history

Unchanged from the original manuscript — not among the 12 patches applied in v2. See Open Review for logged gaps that may affect this statement.

Read this result in context on its source chapter page, or submit a criticism if you believe this statement, as given, is incomplete or incorrect.