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structure definition def or abbrev

DeficitAngleFunctional

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formal statement (Lean)

 136structure DeficitAngleFunctional (n : ℕ) where
 137  deficit : EdgeLengthField n → HingeDatum n → ℝ
 138  area : EdgeLengthField n → HingeDatum n → ℝ
 139  area_pos : ∀ L h, 0 ≤ area L h
 140
 141/-- The Regge action on a list of hinges, as defined by the functional:
 142    `S_Regge = Σ_h A_h · δ_h`. -/

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