helm/software/matita/contribs/RELATIONAL/ZEq/defs.ma

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  14
  15
  16
  17 include "datatypes/Zah.ma".
  18 include "NPlus/defs.ma".
  19
  20 inductive ZEq: Zah → Zah → Prop :=
  21    | zeq: ∀m1,m2,m3,m4,n. m1 ⊕ m4 ≍ n → m3 ⊕ m2 ≍ n →
  22           ZEq 〈m1,m2〉 〈m3, m4〉
  23 .
  24
  25 interpretation "integer equality" 'napart x y = (ZEq x y).
  26