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Commit 82d4b448 authored by Robbert Krebbers's avatar Robbert Krebbers
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Lemma for validity of Some.

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...@@ -72,6 +72,7 @@ Instance option_op : Op (option A) := union_with (λ x y, Some (x ⋅ y)). ...@@ -72,6 +72,7 @@ Instance option_op : Op (option A) := union_with (λ x y, Some (x ⋅ y)).
Instance option_minus : Minus (option A) := Instance option_minus : Minus (option A) :=
difference_with (λ x y, Some (x ⩪ y)). difference_with (λ x y, Some (x ⩪ y)).
Definition Some_valid a : ✓ Some a ↔ ✓ a := reflexivity _.
Definition Some_op a b : Some (a ⋅ b) = Some a ⋅ Some b := eq_refl. Definition Some_op a b : Some (a ⋅ b) = Some a ⋅ Some b := eq_refl.
Lemma option_included (mx my : option A) : Lemma option_included (mx my : option A) :
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