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theorem proved term proof

stable_end_state_exists

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formal statement (Lean)

 157theorem stable_end_state_exists (cfg : NuclearConfig) :
 158    ∃ path : TransmutationPath,
 159      path.start = cfg ∧
 160      nuclearCost path.finish = 0 := by

proof body

Term-mode proof.

 161  use ⟨cfg, stable_config, 1, by rw [stable_config_zero_cost]; exact nuclear_cost_nonneg cfg⟩
 162  exact ⟨rfl, stable_config_zero_cost⟩
 163
 164/-! ## §V. Cost-Descent Optimality -/
 165
 166/-- **THEOREM EN-006.11**: Cost-decreasing transmutation is optimal.
 167    Any sequence of steps that strictly decreases cost will reach stability. -/

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