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Diffstat (limited to 'src/Util/Relations.v')
| -rw-r--r-- | src/Util/Relations.v | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/src/Util/Relations.v b/src/Util/Relations.v index aa280db26..4612fa8a8 100644 --- a/src/Util/Relations.v +++ b/src/Util/Relations.v @@ -27,3 +27,8 @@ Proof. logic; try match goal with [H:_|-_] => (rewrite H || rewrite <-H); assumption end. repeat (assumption||reflexivity||econstructor); assumption. (* WHY the last [assumption]?*) Qed. + +Lemma iff_R_R_same_r {T R} {Req:@Equivalence T R} x y ref : R x y -> (R x ref <-> R y ref). +Proof. + intro Hx; rewrite Hx; clear Hx. reflexivity. +Qed.
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