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def definition def or abbrev

ExcludedMiddle

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 108def ExcludedMiddle (C : ComparisonOperator) : Prop :=

proof body

Definition body.

 109  ContinuousOn (Function.uncurry C) (Set.Ioi (0 : ℝ) ×ˢ Set.Ioi (0 : ℝ))
 110
 111/-- **Scale invariance**: the cost of a comparison depends only on the
 112ratio of the two quantities. This is the structural bridge from a
 113two-argument comparison operator to a one-argument cost on positive ratios.
 114It is what allows the four laws of logic, which make no reference to absolute
 115scale, to be expressed as constraints on the multiplicative group ℝ₊. -/

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