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def definition def or abbrev

tickEquivLogicNat

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formal statement (Lean)

  75def tickEquivLogicNat : Tick ≃ LogicNat :=

proof body

Definition body.

  76  tickEquivNat.trans LogicNat.equivNat.symm
  77
  78/-! ## Tick is a natural-number object -/
  79
  80/-- Recursor on `Tick`: iterate `f` from `x` exactly `t.index` times. -/

depends on (13)

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