diff options
Diffstat (limited to 'mathcomp/field/algC.v')
| -rw-r--r-- | mathcomp/field/algC.v | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mathcomp/field/algC.v b/mathcomp/field/algC.v index 0e3005d..4932148 100644 --- a/mathcomp/field/algC.v +++ b/mathcomp/field/algC.v @@ -166,7 +166,7 @@ have normD x y : le (norm (x + y)) (norm x + norm y). have [-> | nz_u u_ge0 v_ge0] := eqVneq u 0; first by rewrite add0r. by have /andP[]: lt 0 (u + v) by rewrite sposDl // /lt nz_u. have le_sqr u v: conj u = u -> le 0 v -> le (u ^+ 2) (v ^+ 2) -> le u v. - move=> Ru v_ge0; have [-> // | nz_u] := eqVneq u 0. + case: (eqVneq u 0) => [-> //|nz_u Ru v_ge0]. have [u_gt0 | u_le0 _] := boolP (lt 0 u). by rewrite leB (leB u) subr_sqr mulrC addrC; apply: sposM; apply: sposDl. rewrite leB posD // posE normN -addr_eq0; apply/eqP. @@ -931,7 +931,7 @@ Qed. Lemma dvdCP x y : reflect (exists2 z, z \in Cint & y = z * x) (x %| y)%C. Proof. -rewrite unfold_in; have [-> | nz_x] := altP eqP. +rewrite unfold_in; have [-> | nz_x] := eqVneq. by apply: (iffP eqP) => [-> | [z _ ->]]; first exists 0; rewrite ?mulr0. apply: (iffP idP) => [Zyx | [z Zz ->]]; last by rewrite mulfK. by exists (y / x); rewrite ?divfK. @@ -990,7 +990,7 @@ Canonical dvdC_zmodPred x := ZmodPred (dvdC_zmod x). Lemma dvdC_nat (p n : nat) : (p %| n)%C = (p %| n)%N. Proof. rewrite unfold_in CintEge0 ?divr_ge0 ?invr_ge0 ?ler0n // !pnatr_eq0. -have [-> | nz_p] := altP eqP; first by rewrite dvd0n. +have [-> | nz_p] := eqVneq; first by rewrite dvd0n. apply/CnatP/dvdnP=> [[q def_q] | [q ->]]; exists q. by apply/eqP; rewrite -eqC_nat natrM -def_q divfK ?pnatr_eq0. by rewrite [num in num / _]natrM mulfK ?pnatr_eq0. |