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structure definition def or abbrev

SpacetimeRegion

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formal statement (Lean)

  73structure SpacetimeRegion where
  74  /-- Proper volume (in Planck units). -/
  75  volume : ℝ
  76  /-- Volume is positive. -/
  77  volume_pos : volume > 0
  78  /-- Number of ledger entries. -/
  79  entries : ℕ
  80  /-- Total J-cost of entries. -/
  81  totalCost : ℝ
  82
  83/-- The ledger balance requirement: total cost should be zero. -/

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