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def definition def or abbrev

metric_det

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  21def metric_det (g : MetricTensor) (x : Fin 4 → ℝ) : ℝ := g.det x

proof body

Definition body.

  22
  23/-- **DEFINITION: Simplicial Recognition Density**
  24    The number of recognition events per unit volume in the simplicial ledger.
  25    For a covering L, this is the count of simplices containing the point x
  26    divided by their average volume. -/

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