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indexgB A := #|rcosets A B|.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
indexg
conjugateA x := conjg^~ x @: A.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjugate
conjugatesA B := conjugate A @: B.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjugates
classx B := conjg x @: B.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
class
classesA := class^~ A @: A.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
classes
class_supportA B := conjg @2: (A, B).
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
class_support
commg_setA B := commg @2: (A, B).
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
commg_set
normaliserA := [set x | conjugate A x \subset A].
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
normaliser
centraliserA := \bigcap_(x in A) normaliser [set x].
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
centraliser
abelianA := A \subset centraliser A.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
abelian
normalA B := (A \subset B) && (B \subset normaliser A).
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
normal
normalisedA := forall x, conjugate A x = A.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
normalised
centralisesx A := forall y, y \in A -> commute x y.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
centralises
centralisedA := forall x, centralises x A.
Definition
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
centralised
mulsgPA B x : reflect (imset2_spec mul (mem A) (fun _ => mem B) x) (x \in A * B). Proof. exact: imset2P. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulsgP
mem_mulgA B x y : x \in A -> y \in B -> x * y \in A * B. Proof. by move=> Ax By; apply/mulsgP; exists x y. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_mulg
prodsgP(I : finType) (P : pred I) (A : I -> {set gT}) x : reflect (exists2 c, forall i, P i -> c i \in A i & x = \prod_(i | P i) c i) (x \in \prod_(i | P i) A i). Proof. have [r big_r [Ur mem_r] _] := big_enumP P. pose inA c := all (fun i => c i \in A i); rewrite -big_r; set piAx := x \in _. suffices{big_r} IHr: reflect (exists2 c, inA c r & x = \prod_(i <- r) c i) piAx. apply: (iffP IHr) => -[c inAc ->]; do [exists c; last by rewrite big_r]. by move=> i Pi; rewrite (allP inAc) ?mem_r. by apply/allP=> i; rewrite mem_r => /inAc. elim: {P mem_r}r x @piAx Ur => /= [x _ | i r IHr x /andP[r'i /IHr{}IHr]]. by rewrite unlock; apply: (iffP set1P) => [-> | [] //]; exists (fun=> x). rewrite big_cons; apply: (iffP idP) => [|[c /andP[Aci Ac] ->]]; last first. by rewrite big_cons mem_mulg //; apply/IHr=> //; exists c. case/mulsgP=> c_i _ Ac_i /IHr[c /allP-inAcr ->] ->{x}. exists [eta c with i |-> c_i]; rewrite /= ?big_cons eqxx ?Ac_i. by apply/allP=> j rj; rewrite /= ifN ?(memPn r'i) ?inAcr. by congr (_ * _); apply: eq_big_seq => j rj; rewrite ifN ?(memPn r'i). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
prodsgP
mem_prodg(I : finType) (P : pred I) (A : I -> {set gT}) c : (forall i, P i -> c i \in A i) -> \prod_(i | P i) c i \in \prod_(i | P i) A i. Proof. by move=> Ac; apply/prodsgP; exists c. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_prodg
mulSgA B C : A \subset B -> A * C \subset B * C. Proof. exact: imset2Sl. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulSg
mulgSA B C : B \subset C -> A * B \subset A * C. Proof. exact: imset2Sr. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulgS
mulgSSA B C D : A \subset B -> C \subset D -> A * C \subset B * D. Proof. exact: imset2S. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulgSS
mulg_sublA B : 1 \in B -> A \subset A * B. Proof. by move=> B1; rewrite -{1}(mulg1 A) mulgS ?sub1set. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulg_subl
mulg_subrA B : 1 \in A -> B \subset A * B. Proof. by move=> A1; rewrite -{1}(mul1g B) mulSg ?sub1set. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulg_subr
mulUgA B C : (A :|: B) * C = (A * C) :|: (B * C). Proof. exact: imset2Ul. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulUg
mulgUA B C : A * (B :|: C) = (A * B) :|: (A * C). Proof. exact: imset2Ur. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulgU
invUgA B : (A :|: B)^-1 = A^-1 :|: B^-1. Proof. exact: preimsetU. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
invUg
invIgA B : (A :&: B)^-1 = A^-1 :&: B^-1. Proof. exact: preimsetI. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
invIg
invDgA B : (A :\: B)^-1 = A^-1 :\: B^-1. Proof. exact: preimsetD. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
invDg
invCgA : (~: A)^-1 = ~: A^-1. Proof. exact: preimsetC. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
invCg
invSgA B : (A^-1 \subset B^-1) = (A \subset B). Proof. by rewrite !(sameP setIidPl eqP) -invIg (inj_eq invg_inj). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
invSg
mem_invgx A : (x \in A^-1) = (x^-1 \in A). Proof. by rewrite inE. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_invg
memV_invgx A : (x^-1 \in A^-1) = (x \in A). Proof. by rewrite inE invgK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
memV_invg
card_invgA : #|A^-1| = #|A|. Proof. exact/card_preimset/invg_inj. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
card_invg
set1gE: 1 = [set 1] :> {set gT}. Proof. by []. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
set1gE
set1gPx : reflect (x = 1) (x \in [1 gT]). Proof. exact: set1P. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
set1gP
mulg_set1x y : [set x] :* y = [set x * y]. Proof. by rewrite [_ * _]imset2_set1l imset_set1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mulg_set1
invg_set1x : [set x]^-1 = [set x^-1]. Proof. by apply/setP=> y; rewrite !inE inv_eq //; apply: invgK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
invg_set1
lcosetEA x : lcoset A x = x *: A. Proof. by rewrite [_ * _]imset2_set1l. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcosetE
card_lcosetA x : #|x *: A| = #|A|. Proof. by rewrite -lcosetE (card_imset _ (mulgI _)). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
card_lcoset
mem_lcosetA x y : (y \in x *: A) = (x^-1 * y \in A). Proof. by rewrite -lcosetE [_ x](can_imset_pre _ (mulKg _)) inE. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_lcoset
lcosetPA x y : reflect (exists2 a, a \in A & y = x * a) (y \in x *: A). Proof. by rewrite -lcosetE; apply: imsetP. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcosetP
lcosetsPA B C : reflect (exists2 x, x \in B & C = x *: A) (C \in lcosets A B). Proof. by apply: (iffP imsetP) => [] [x Bx ->]; exists x; rewrite ?lcosetE. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcosetsP
lcosetMA x y : (x * y) *: A = x *: (y *: A). Proof. by rewrite -mulg_set1 mulgA. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcosetM
lcoset1A : 1 *: A = A. Proof. exact: mul1g. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcoset1
lcosetK: left_loop inv (fun x A => x *: A). Proof. by move=> x A; rewrite -lcosetM mulVg mul1g. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcosetK
lcosetKV: rev_left_loop inv (fun x A => x *: A). Proof. by move=> x A; rewrite -lcosetM mulgV mul1g. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcosetKV
lcoset_inj: right_injective (fun x A => x *: A). Proof. by move=> x; apply: can_inj (lcosetK x). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcoset_inj
lcosetSx A B : (x *: A \subset x *: B) = (A \subset B). Proof. apply/idP/idP=> sAB; last exact: mulgS. by rewrite -(lcosetK x A) -(lcosetK x B) mulgS. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
lcosetS
sub_lcosetx A B : (A \subset x *: B) = (x^-1 *: A \subset B). Proof. by rewrite -(lcosetS x^-1) lcosetK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
sub_lcoset
sub_lcosetVx A B : (A \subset x^-1 *: B) = (x *: A \subset B). Proof. by rewrite sub_lcoset invgK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
sub_lcosetV
rcosetEA x : rcoset A x = A :* x. Proof. by rewrite [_ * _]imset2_set1r. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcosetE
card_rcosetA x : #|A :* x| = #|A|. Proof. by rewrite -rcosetE (card_imset _ (mulIg _)). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
card_rcoset
mem_rcosetA x y : (y \in A :* x) = (y * x^-1 \in A). Proof. by rewrite -rcosetE [_ x](can_imset_pre A (mulgK _)) inE. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_rcoset
rcosetPA x y : reflect (exists2 a, a \in A & y = a * x) (y \in A :* x). Proof. by rewrite -rcosetE; apply: imsetP. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcosetP
rcosetsPA B C : reflect (exists2 x, x \in B & C = A :* x) (C \in rcosets A B). Proof. by apply: (iffP imsetP) => [] [x Bx ->]; exists x; rewrite ?rcosetE. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcosetsP
rcosetMA x y : A :* (x * y) = A :* x :* y. Proof. by rewrite -mulg_set1 mulgA. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcosetM
rcoset1A : A :* 1 = A. Proof. exact: mulg1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcoset1
rcosetK: right_loop inv (fun A x => A :* x). Proof. by move=> x A; rewrite -rcosetM mulgV mulg1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcosetK
rcosetKV: rev_right_loop inv (fun A x => A :* x). Proof. by move=> x A; rewrite -rcosetM mulVg mulg1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcosetKV
rcoset_inj: left_injective (fun A x => A :* x). Proof. by move=> x; apply: can_inj (rcosetK x). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcoset_inj
rcosetSx A B : (A :* x \subset B :* x) = (A \subset B). Proof. apply/idP/idP=> sAB; last exact: mulSg. by rewrite -(rcosetK x A) -(rcosetK x B) mulSg. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
rcosetS
sub_rcosetx A B : (A \subset B :* x) = (A :* x ^-1 \subset B). Proof. by rewrite -(rcosetS x^-1) rcosetK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
sub_rcoset
sub_rcosetVx A B : (A \subset B :* x^-1) = (A :* x \subset B). Proof. by rewrite sub_rcoset invgK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
sub_rcosetV
invg_lcosetsA B : (lcosets A B)^-1 = rcosets A^-1 B^-1. Proof. rewrite /A^-1/= -![_^-1](can_imset_pre _ invgK) -[RHS]imset_comp -imset_comp. by apply: eq_imset => x /=; rewrite lcosetE rcosetE invMg invg_set1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
invg_lcosets
conjg_preimA x : A :^ x = (conjg^~ x^-1) @^-1: A. Proof. exact: can_imset_pre (conjgK _). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjg_preim
mem_conjgA x y : (y \in A :^ x) = (y ^ x^-1 \in A). Proof. by rewrite conjg_preim inE. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_conjg
mem_conjgVA x y : (y \in A :^ x^-1) = (y ^ x \in A). Proof. by rewrite mem_conjg invgK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_conjgV
memJ_conjgA x y : (y ^ x \in A :^ x) = (y \in A). Proof. by rewrite mem_conjg conjgK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
memJ_conjg
conjsgEA x : A :^ x = x^-1 *: (A :* x). Proof. by apply/setP=> y; rewrite mem_lcoset mem_rcoset -mulgA mem_conjg. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsgE
conjsg1A : A :^ 1 = A. Proof. by rewrite conjsgE invg1 mul1g mulg1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsg1
conjsgMA x y : A :^ (x * y) = (A :^ x) :^ y. Proof. by rewrite !conjsgE invMg -!mulg_set1 !mulgA. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsgM
conjsgK: @right_loop _ gT inv conjugate. Proof. by move=> x A; rewrite -conjsgM mulgV conjsg1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsgK
conjsgKV: @rev_right_loop _ gT inv conjugate. Proof. by move=> x A; rewrite -conjsgM mulVg conjsg1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsgKV
conjsg_inj: @left_injective _ gT _ conjugate. Proof. by move=> x; apply: can_inj (conjsgK x). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsg_inj
cardJgA x : #|A :^ x| = #|A|. Proof. by rewrite (card_imset _ (conjg_inj x)). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
cardJg
conjSgA B x : (A :^ x \subset B :^ x) = (A \subset B). Proof. by rewrite !conjsgE lcosetS rcosetS. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjSg
properJA B x : (A :^ x \proper B :^ x) = (A \proper B). Proof. by rewrite /proper !conjSg. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
properJ
sub_conjgA B x : (A :^ x \subset B) = (A \subset B :^ x^-1). Proof. by rewrite -(conjSg A _ x) conjsgKV. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
sub_conjg
sub_conjgVA B x : (A :^ x^-1 \subset B) = (A \subset B :^ x). Proof. by rewrite -(conjSg _ B x) conjsgKV. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
sub_conjgV
conjg_set1x y : [set x] :^ y = [set x ^ y]. Proof. by rewrite [_ :^ _]imset_set1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjg_set1
conjs1gx : 1 :^ x = 1. Proof. by rewrite conjg_set1 conj1g. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjs1g
conjsg_eq1A x : (A :^ x == 1%g) = (A == 1%g). Proof. by rewrite (canF_eq (conjsgK x)) conjs1g. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsg_eq1
conjsMgA B x : (A * B) :^ x = A :^ x * B :^ x. Proof. by rewrite !conjsgE !mulgA rcosetK. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjsMg
conjIgA B x : (A :&: B) :^ x = A :^ x :&: B :^ x. Proof. by rewrite !conjg_preim preimsetI. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjIg
conj0gx : set0 :^ x = set0. Proof. exact: imset0. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conj0g
conjTgx : [set: gT] :^ x = [set: gT]. Proof. by rewrite conjg_preim preimsetT. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjTg
bigcapJI r (P : pred I) (B : I -> {set gT}) x : \bigcap_(i <- r | P i) (B i :^ x) = (\bigcap_(i <- r | P i) B i) :^ x. Proof. by rewrite (big_endo (conjugate^~ x)) => // [B1 B2|]; rewrite (conjTg, conjIg). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
bigcapJ
conjUgA B x : (A :|: B) :^ x = A :^ x :|: B :^ x. Proof. by rewrite !conjg_preim preimsetU. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjUg
bigcupJI r (P : pred I) (B : I -> {set gT}) x : \bigcup_(i <- r | P i) (B i :^ x) = (\bigcup_(i <- r | P i) B i) :^ x. Proof. rewrite (big_endo (conjugate^~ x)) => // [B1 B2|]; first by rewrite conjUg. exact: imset0. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
bigcupJ
conjCgA x : (~: A) :^ x = ~: A :^ x. Proof. by rewrite !conjg_preim preimsetC. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjCg
conjDgA B x : (A :\: B) :^ x = A :^ x :\: B :^ x. Proof. by rewrite !setDE !(conjCg, conjIg). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjDg
conjD1gA x : A^# :^ x = (A :^ x)^#. Proof. by rewrite conjDg conjs1g. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
conjD1g
memJ_classx y A : y \in A -> x ^ y \in x ^: A. Proof. exact: imset_f. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
memJ_class
classSx A B : A \subset B -> x ^: A \subset x ^: B. Proof. exact: imsetS. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
classS
class_set1x y : x ^: [set y] = [set x ^ y]. Proof. exact: imset_set1. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
class_set1
class1gx A : x \in A -> 1 ^: A = 1. Proof. move=> Ax; apply/setP=> y. by apply/imsetP/set1P=> [[a Aa]|] ->; last exists x; rewrite ?conj1g. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
class1g
classVgx A : x^-1 ^: A = (x ^: A)^-1. Proof. apply/setP=> xy; rewrite inE; apply/imsetP/imsetP=> [] [y Ay def_xy]. by rewrite def_xy conjVg invgK; exists y. by rewrite -[xy]invgK def_xy -conjVg; exists y. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
classVg
mem_classesx A : x \in A -> x ^: A \in classes A. Proof. exact: imset_f. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
mem_classes
memJ_class_supportA B x y : x \in A -> y \in B -> x ^ y \in class_support A B. Proof. by move=> Ax By; apply: imset2_f. Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
memJ_class_support
class_supportMA B C : class_support A (B * C) = class_support (class_support A B) C. Proof. apply/setP=> x; apply/imset2P/imset2P=> [[a y Aa] | [y c]]. case/mulsgP=> b c Bb Cc -> ->{x y}. by exists (a ^ b) c; rewrite ?(imset2_f, conjgM). case/imset2P=> a b Aa Bb -> Cc ->{x y}. by exists a (b * c); rewrite ?(mem_mulg, conjgM). Qed.
Lemma
fingroup
[ "From HB Require Import structures", "From mathcomp Require Import ssreflect ssrbool ssrfun eqtype ssrnat seq choice", "From mathcomp Require Import fintype div path tuple bigop prime finset", "From mathcomp Require Export monoid" ]
fingroup/fingroup.v
class_supportM