stable_config
plain-language theorem explainer
stable_config defines the nuclear configuration with ledger ratio exactly 1, the zero J-cost point for doubly-magic nuclei. Modelers of RS transmutation pathways cite it as the canonical attractor state. The definition is a direct constructor application of the nuclear configuration structure at the unit ratio.
Claim. The stable nuclear configuration is the element of the nuclear configuration structure with stability ratio $x=1$.
background
NuclearConfig is the structure whose field ratio : ℝ records the ledger ratio of a nuclear state, with the positivity witness ratio_pos : 0 < ratio; the value x=1 marks doubly-magic nuclei. The module EN-006 derives transmutation conditions from the J-cost barrier, where fission products lie at positive cost and doubly-magic nuclei are local minima. Upstream cost definitions from MultiplicativeRecognizerL4 and ObserverForcing supply the J-cost map used throughout the module.
proof idea
One-line definition that constructs the nuclear configuration structure at ratio 1 together with the positivity witness one_pos.
why it matters
This definition supplies the zero-cost endpoint referenced by stable_config_zero_cost (EN-006.7) and by fission_transmutation_structure, which asserts existence of a stable end state. It realizes the doubly-magic attractor required by the cost-monotone descent theorems and by the overall EN-006 claim that every transmutation path reaches a global minimum.
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