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def definition def or abbrev

solid_angle

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formal statement (Lean)

  54noncomputable def solid_angle (d : ℕ) : ℝ :=

proof body

Definition body.

  55  match d with
  56  | 3 => 4 * Real.pi
  57  | _ => 0  -- placeholder for other dimensions
  58
  59/-- The "per-steradian" correction is the inverse solid angle. -/

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depends on (6)

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