diff options
Diffstat (limited to 'mathcomp/fingroup/morphism.v')
| -rw-r--r-- | mathcomp/fingroup/morphism.v | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/mathcomp/fingroup/morphism.v b/mathcomp/fingroup/morphism.v index cb02991..aa2a809 100644 --- a/mathcomp/fingroup/morphism.v +++ b/mathcomp/fingroup/morphism.v @@ -873,6 +873,7 @@ Notation "f @*^-1 M" := (morphpre_group (MorPhantom f) M) : Group_scope. Notation "f @: D" := (morph_dom_group f D) : Group_scope. Arguments injmP {aT rT D f}. +Arguments morphpreK {aT rT D f} [R] sRf. Section IdentityMorphism. @@ -1491,10 +1492,10 @@ Canonical sgval_morphism := Morphism (@sgvalM _ G). Canonical subg_morphism := Morphism (@subgM _ G). Lemma injm_sgval : 'injm sgval. -Proof. by apply/injmP; apply: in2W; apply: subg_inj. Qed. +Proof. exact/injmP/(in2W subg_inj). Qed. Lemma injm_subg : 'injm (subg G). -Proof. by apply/injmP; apply: can_in_inj (@subgK _ _). Qed. +Proof. exact/injmP/(can_in_inj subgK). Qed. Hint Resolve injm_sgval injm_subg : core. Lemma ker_sgval : 'ker sgval = 1. Proof. exact/trivgP. Qed. @@ -1537,3 +1538,6 @@ Proof. exact: isom_isog isom_subg. Qed. End SubMorphism. +Arguments sgvalmK {gT G} A. +Arguments subgmK {gT G} [A] sAG. + |