thermosphere_rung
plain-language theorem explainer
The declaration assigns the thermosphere base rung the natural number 7 on the phi-altitude ladder. Climate modelers using Recognition Science cite it when assembling the master certificate that places layer boundaries at phi-rung steps. The assignment is a direct constant definition with no further reduction.
Claim. The thermosphere base rung on the phi-altitude ladder is the natural number 7.
background
In this module the phi-ladder places atmospheric layer boundaries at integer rungs k where altitude scales as z_0 phi^k with z_0 the recognition-base altitude. The supplied module doc states tropopause at rung 0, stratopause at rung 3, and thermosphere at rung 7, with the thermosphere/mesopause ratio matching phi^7. These rung numbers are the inputs to the AtmosphericLayeringFromPhiLadderCert structure and the one-statement layering theorem.
proof idea
The declaration is a direct definition that binds the constant 7 to thermosphere_rung.
why it matters
This definition supplies the thermosphere rung value required by the AtmosphericLayeringFromPhiLadderCert structure and the atmospheric_layering_one_statement theorem. It completes the set of rung assignments (0, 3, 7) that realize the phi-ladder predictions for layer ratios inside the empirical bands. The placement follows the phi self-similar fixed point forced in the unified chain.
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