diff options
Diffstat (limited to 'src/Util/Sum.v')
| -rw-r--r-- | src/Util/Sum.v | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/src/Util/Sum.v b/src/Util/Sum.v index fe7fe662b..4d4fde6ac 100644 --- a/src/Util/Sum.v +++ b/src/Util/Sum.v @@ -10,10 +10,12 @@ Definition sumwise {A B} (RA:relation A) (RB : relation B) : relation (A + B) | _, _ => False end. -Global Instance Equivalence_sumwise {A B} {RA:relation A} {RB:relation B} - {RA_equiv:Equivalence RA} {RB_equiv:Equivalence RB} - : Equivalence (sumwise RA RB). +Global Instance Equivalence_sumwise + : forall {A B} {RA:relation A} {RB:relation B} + {RA_equiv:Equivalence RA} {RB_equiv:Equivalence RB}, + Equivalence (sumwise RA RB). Proof. + intros A B RA RB RA_equiv RB_equiv. split; repeat intros [?|?]; simpl; trivial; destruct RA_equiv, RB_equiv; try tauto; eauto. Qed. |