diff options
| author | Anton Trunov | 2019-05-29 12:52:42 +0300 |
|---|---|---|
| committer | Anton Trunov | 2019-05-29 12:52:42 +0300 |
| commit | 1aa27b589c437b88cc6fb556edfceac42da449ea (patch) | |
| tree | 89ca80f1debd99159a24bfb4246a35cb3c96287b /mathcomp/ssreflect/eqtype.v | |
| parent | c7c344f2f08f3910c884d9c3bb1bd5cfe3c2a1d7 (diff) | |
Canonical way of expressing dis-equality on an eqType is x != y
Addressing a suggestion by @CohenCyril
Diffstat (limited to 'mathcomp/ssreflect/eqtype.v')
| -rw-r--r-- | mathcomp/ssreflect/eqtype.v | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/mathcomp/ssreflect/eqtype.v b/mathcomp/ssreflect/eqtype.v index 1f700fa..75a04ef 100644 --- a/mathcomp/ssreflect/eqtype.v +++ b/mathcomp/ssreflect/eqtype.v @@ -198,10 +198,10 @@ Hint Resolve eq_refl eq_sym : core. Variant eq_xor_neq_sym (T : eqType) (x y : T) : bool -> bool -> Set := | EqNotNeqSym of x = y : eq_xor_neq_sym x y true true - | NeqNotEqSym of x <> y : eq_xor_neq_sym x y false false. + | NeqNotEqSym of x != y : eq_xor_neq_sym x y false false. Lemma eqPsym (T : eqType) (x y : T) : eq_xor_neq_sym x y (y == x) (x == y). -Proof. by rewrite eq_sym; case: eqP; constructor. Qed. +Proof. by rewrite eq_sym; case: eqP=> [|/eqP]; constructor. Qed. Arguments eqPsym {T x y}. |