diff options
| author | Cyril Cohen | 2019-05-29 18:48:38 +0200 |
|---|---|---|
| committer | GitHub | 2019-05-29 18:48:38 +0200 |
| commit | bd4300d26ecbb43f7170e8da7eaaff1a13cc70b1 (patch) | |
| tree | c685f3321960d062eedc51708c3f956d19a40515 /mathcomp/algebra/poly.v | |
| parent | 6bf8d7707ec6a1d9baf0ce8abaa31f1d681b3b99 (diff) | |
| parent | ccceb6fbd3bd811b728f6e11dad3cf255a577801 (diff) | |
Replace eqVneq to destruct both x == y, but also y == x (#351)
Diffstat (limited to 'mathcomp/algebra/poly.v')
| -rw-r--r-- | mathcomp/algebra/poly.v | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mathcomp/algebra/poly.v b/mathcomp/algebra/poly.v index d898774..a3b9211 100644 --- a/mathcomp/algebra/poly.v +++ b/mathcomp/algebra/poly.v @@ -368,7 +368,7 @@ Lemma nil_poly p : nilp p = (p == 0). Proof. exact: size_poly_eq0. Qed. Lemma poly0Vpos p : {p = 0} + {size p > 0}. -Proof. by rewrite lt0n size_poly_eq0; apply: eqVneq. Qed. +Proof. by rewrite lt0n size_poly_eq0; case: eqVneq; [left | right]. Qed. Lemma polySpred p : p != 0 -> size p = (size p).-1.+1. Proof. by rewrite -size_poly_eq0 -lt0n => /prednK. Qed. |