Theorem subgga 16537

Description: A subgroup acts on its parent group. (Contributed by Jeff Hankins, 13-Aug-2009.) (Proof shortened by Mario Carneiro, 13-Jan-2015.)

Hypotheses

Ref	Expression
subgga.1	|- X = ( Base ` G )
subgga.2	|- .+ = ( +g ` G )
subgga.3	|- H = ( G ↾s Y )
subgga.4	|- F = ( x e. Y , y e. X |-> ( x .+ y ) )

Assertion

Ref	Expression
subgga	|- ( Y e. (SubGrp ` G ) -> F e. ( H GrpAct X ) )

Distinct variable groups:   x, y, G   x, X, y   x, Y, y   x, .+ , y

Allowed substitution hints:   F( x, y)   H( x, y)

Proof of Theorem subgga

Dummy variables v u w are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		subgga.3	. . . 4 |- H = ( G ↾s Y )
2	1	subggrp 16403	. . 3 |- ( Y e. (SubGrp ` G ) -> H e. Grp )
3		subgga.1	. . . 4 |- X = ( Base ` G )
4		fvex 5858	. . . 4 |- ( Base ` G ) e. _V
5	3, 4	eqeltri 2538	. . 3 |- X e. _V
6	2, 5	jctir 536	. 2 |- ( Y e. (SubGrp ` G ) -> ( H e. Grp /\ X e. _V ) )
7		subgrcl 16405	. . . . . . . 8 |- ( Y e. (SubGrp ` G ) -> G e. Grp )
8	7	adantr 463	. . . . . . 7 |- ( ( Y e. (SubGrp ` G ) /\ ( x e. Y /\ y e. X ) ) -> G e. Grp )
9	3	subgss 16401	. . . . . . . . 9 |- ( Y e. (SubGrp ` G ) -> Y C_ X )
10	9	sselda 3489	. . . . . . . 8 |- ( ( Y e. (SubGrp ` G ) /\ x e. Y ) -> x e. X )
11	10	adantrr 714	. . . . . . 7 |- ( ( Y e. (SubGrp ` G ) /\ ( x e. Y /\ y e. X ) ) -> x e. X )
12		simprr 755	. . . . . . 7 |- ( ( Y e. (SubGrp ` G ) /\ ( x e. Y /\ y e. X ) ) -> y e. X )
13		subgga.2	. . . . . . . 8 |- .+ = ( +g ` G )
14	3, 13	grpcl 16262	. . . . . . 7 |- ( ( G e. Grp /\ x e. X /\ y e. X ) -> ( x .+ y ) e. X )
15	8, 11, 12, 14	syl3anc 1226	. . . . . 6 |- ( ( Y e. (SubGrp ` G ) /\ ( x e. Y /\ y e. X ) ) -> ( x .+ y ) e. X )
16	15	ralrimivva 2875	. . . . 5 |- ( Y e. (SubGrp ` G ) -> A. x e. Y A. y e. X ( x .+ y ) e. X )
17		subgga.4	. . . . . 6 |- F = ( x e. Y , y e. X |-> ( x .+ y ) )
18	17	fmpt2 6840	. . . . 5 |- ( A. x e. Y A. y e. X ( x .+ y ) e. X <-> F : ( Y X. X ) --> X )
19	16, 18	sylib 196	. . . 4 |- ( Y e. (SubGrp ` G ) -> F : ( Y X. X ) --> X )
20	1	subgbas 16404	. . . . . 6 |- ( Y e. (SubGrp ` G ) -> Y = ( Base ` H ) )
21	20	xpeq1d 5011	. . . . 5 |- ( Y e. (SubGrp ` G ) -> ( Y X. X ) = ( ( Base ` H ) X. X ) )
22	21	feq2d 5700	. . . 4 |- ( Y e. (SubGrp ` G ) -> ( F : ( Y X. X ) --> X <-> F : ( ( Base ` H ) X. X ) --> X ) )
23	19, 22	mpbid 210	. . 3 |- ( Y e. (SubGrp ` G ) -> F : ( ( Base ` H ) X. X ) --> X )
24		eqid 2454	. . . . . . . 8 |- ( 0g ` G ) = ( 0g ` G )
25	24	subg0cl 16408	. . . . . . 7 |- ( Y e. (SubGrp ` G ) -> ( 0g ` G ) e. Y )
26		oveq12 6279	. . . . . . . 8 |- ( ( x = ( 0g ` G ) /\ y = u ) -> ( x .+ y ) = ( ( 0g ` G ) .+ u ) )
27		ovex 6298	. . . . . . . 8 |- ( ( 0g ` G ) .+ u ) e. _V
28	26, 17, 27	ovmpt2a 6406	. . . . . . 7 |- ( ( ( 0g ` G ) e. Y /\ u e. X ) -> ( ( 0g ` G ) F u ) = ( ( 0g ` G ) .+ u ) )
29	25, 28	sylan 469	. . . . . 6 |- ( ( Y e. (SubGrp ` G ) /\ u e. X ) -> ( ( 0g ` G ) F u ) = ( ( 0g ` G ) .+ u ) )
30	1, 24	subg0 16406	. . . . . . . 8 |- ( Y e. (SubGrp ` G ) -> ( 0g ` G ) = ( 0g ` H ) )
31	30	oveq1d 6285	. . . . . . 7 |- ( Y e. (SubGrp ` G ) -> ( ( 0g ` G ) F u ) = ( ( 0g ` H ) F u ) )
32	31	adantr 463	. . . . . 6 |- ( ( Y e. (SubGrp ` G ) /\ u e. X ) -> ( ( 0g ` G ) F u ) = ( ( 0g ` H ) F u ) )
33	3, 13, 24	grplid 16279	. . . . . . 7 |- ( ( G e. Grp /\ u e. X ) -> ( ( 0g ` G ) .+ u ) = u )
34	7, 33	sylan 469	. . . . . 6 |- ( ( Y e. (SubGrp ` G ) /\ u e. X ) -> ( ( 0g ` G ) .+ u ) = u )
35	29, 32, 34	3eqtr3d 2503	. . . . 5 |- ( ( Y e. (SubGrp ` G ) /\ u e. X ) -> ( ( 0g ` H ) F u ) = u )
36	7	ad2antrr 723	. . . . . . . . . 10 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> G e. Grp )
37	9	ad2antrr 723	. . . . . . . . . . 11 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> Y C_ X )
38		simprl 754	. . . . . . . . . . 11 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> v e. Y )
39	37, 38	sseldd 3490	. . . . . . . . . 10 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> v e. X )
40		simprr 755	. . . . . . . . . . 11 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> w e. Y )
41	37, 40	sseldd 3490	. . . . . . . . . 10 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> w e. X )
42		simplr 753	. . . . . . . . . 10 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> u e. X )
43	3, 13	grpass 16263	. . . . . . . . . 10 |- ( ( G e. Grp /\ ( v e. X /\ w e. X /\ u e. X ) ) -> ( ( v .+ w ) .+ u ) = ( v .+ ( w .+ u ) ) )
44	36, 39, 41, 42, 43	syl13anc 1228	. . . . . . . . 9 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( ( v .+ w ) .+ u ) = ( v .+ ( w .+ u ) ) )
45	3, 13	grpcl 16262	. . . . . . . . . . 11 |- ( ( G e. Grp /\ w e. X /\ u e. X ) -> ( w .+ u ) e. X )
46	36, 41, 42, 45	syl3anc 1226	. . . . . . . . . 10 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( w .+ u ) e. X )
47		oveq12 6279	. . . . . . . . . . 11 |- ( ( x = v /\ y = ( w .+ u ) ) -> ( x .+ y ) = ( v .+ ( w .+ u ) ) )
48		ovex 6298	. . . . . . . . . . 11 |- ( v .+ ( w .+ u ) ) e. _V
49	47, 17, 48	ovmpt2a 6406	. . . . . . . . . 10 |- ( ( v e. Y /\ ( w .+ u ) e. X ) -> ( v F ( w .+ u ) ) = ( v .+ ( w .+ u ) ) )
50	38, 46, 49	syl2anc 659	. . . . . . . . 9 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( v F ( w .+ u ) ) = ( v .+ ( w .+ u ) ) )
51	44, 50	eqtr4d 2498	. . . . . . . 8 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( ( v .+ w ) .+ u ) = ( v F ( w .+ u ) ) )
52	13	subgcl 16410	. . . . . . . . . . 11 |- ( ( Y e. (SubGrp ` G ) /\ v e. Y /\ w e. Y ) -> ( v .+ w ) e. Y )
53	52	3expb 1195	. . . . . . . . . 10 |- ( ( Y e. (SubGrp ` G ) /\ ( v e. Y /\ w e. Y ) ) -> ( v .+ w ) e. Y )
54	53	adantlr 712	. . . . . . . . 9 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( v .+ w ) e. Y )
55		oveq12 6279	. . . . . . . . . 10 |- ( ( x = ( v .+ w ) /\ y = u ) -> ( x .+ y ) = ( ( v .+ w ) .+ u ) )
56		ovex 6298	. . . . . . . . . 10 |- ( ( v .+ w ) .+ u ) e. _V
57	55, 17, 56	ovmpt2a 6406	. . . . . . . . 9 |- ( ( ( v .+ w ) e. Y /\ u e. X ) -> ( ( v .+ w ) F u ) = ( ( v .+ w ) .+ u ) )
58	54, 42, 57	syl2anc 659	. . . . . . . 8 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( ( v .+ w ) F u ) = ( ( v .+ w ) .+ u ) )
59		oveq12 6279	. . . . . . . . . . 11 |- ( ( x = w /\ y = u ) -> ( x .+ y ) = ( w .+ u ) )
60		ovex 6298	. . . . . . . . . . 11 |- ( w .+ u ) e. _V
61	59, 17, 60	ovmpt2a 6406	. . . . . . . . . 10 |- ( ( w e. Y /\ u e. X ) -> ( w F u ) = ( w .+ u ) )
62	40, 42, 61	syl2anc 659	. . . . . . . . 9 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( w F u ) = ( w .+ u ) )
63	62	oveq2d 6286	. . . . . . . 8 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( v F ( w F u ) ) = ( v F ( w .+ u ) ) )
64	51, 58, 63	3eqtr4d 2505	. . . . . . 7 |- ( ( ( Y e. (SubGrp ` G ) /\ u e. X ) /\ ( v e. Y /\ w e. Y ) ) -> ( ( v .+ w ) F u ) = ( v F ( w F u ) ) )
65	64	ralrimivva 2875	. . . . . 6 |- ( ( Y e. (SubGrp ` G ) /\ u e. X ) -> A. v e. Y A. w e. Y ( ( v .+ w ) F u ) = ( v F ( w F u ) ) )
66	1, 13	ressplusg 14830	. . . . . . . . . . . 12 |- ( Y e. (SubGrp ` G ) -> .+ = ( +g ` H ) )
67	66	oveqd 6287	. . . . . . . . . . 11 |- ( Y e. (SubGrp ` G ) -> ( v .+ w ) = ( v ( +g ` H ) w ) )
68	67	oveq1d 6285	. . . . . . . . . 10 |- ( Y e. (SubGrp ` G ) -> ( ( v .+ w ) F u ) = ( ( v ( +g ` H ) w ) F u ) )
69	68	eqeq1d 2456	. . . . . . . . 9 |- ( Y e. (SubGrp ` G ) -> ( ( ( v .+ w ) F u ) = ( v F ( w F u ) ) <-> ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) ) )
70	20, 69	raleqbidv 3065	. . . . . . . 8 |- ( Y e. (SubGrp ` G ) -> ( A. w e. Y ( ( v .+ w ) F u ) = ( v F ( w F u ) ) <-> A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) ) )
71	20, 70	raleqbidv 3065	. . . . . . 7 |- ( Y e. (SubGrp ` G ) -> ( A. v e. Y A. w e. Y ( ( v .+ w ) F u ) = ( v F ( w F u ) ) <-> A. v e. ( Base ` H ) A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) ) )
72	71	biimpa 482	. . . . . 6 |- ( ( Y e. (SubGrp ` G ) /\ A. v e. Y A. w e. Y ( ( v .+ w ) F u ) = ( v F ( w F u ) ) ) -> A. v e. ( Base ` H ) A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) )
73	65, 72	syldan 468	. . . . 5 |- ( ( Y e. (SubGrp ` G ) /\ u e. X ) -> A. v e. ( Base ` H ) A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) )
74	35, 73	jca 530	. . . 4 |- ( ( Y e. (SubGrp ` G ) /\ u e. X ) -> ( ( ( 0g ` H ) F u ) = u /\ A. v e. ( Base ` H ) A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) ) )
75	74	ralrimiva 2868	. . 3 |- ( Y e. (SubGrp ` G ) -> A. u e. X ( ( ( 0g ` H ) F u ) = u /\ A. v e. ( Base ` H ) A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) ) )
76	23, 75	jca 530	. 2 |- ( Y e. (SubGrp ` G ) -> ( F : ( ( Base ` H ) X. X ) --> X /\ A. u e. X ( ( ( 0g ` H ) F u ) = u /\ A. v e. ( Base ` H ) A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) ) ) )
77		eqid 2454	. . 3 |- ( Base ` H ) = ( Base ` H )
78		eqid 2454	. . 3 |- ( +g ` H ) = ( +g ` H )
79		eqid 2454	. . 3 |- ( 0g ` H ) = ( 0g ` H )
80	77, 78, 79	isga 16528	. 2 |- ( F e. ( H GrpAct X ) <-> ( ( H e. Grp /\ X e. _V ) /\ ( F : ( ( Base ` H ) X. X ) --> X /\ A. u e. X ( ( ( 0g ` H ) F u ) = u /\ A. v e. ( Base ` H ) A. w e. ( Base ` H ) ( ( v ( +g ` H ) w ) F u ) = ( v F ( w F u ) ) ) ) ) )
81	6, 76, 80	sylanbrc 662	1 |- ( Y e. (SubGrp ` G ) -> F e. ( H GrpAct X ) )

Syntax hints:   -> wi 4   /\ wa 367   = wceq 1398   e. wcel 1823   A.wral 2804   _Vcvv 3106   C_ wss 3461   X. cxp 4986   -->wf 5566   ` cfv 5570  (class class class)co 6270   |-> cmpt2 6272   Basecbs 14716   ↾_s cress 14717   +g cplusg 14784   0gc0g 14929   Grpcgrp 16252  SubGrpcsubg 16394   GrpAct cga 16526

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1623  ax-4 1636  ax-5 1709  ax-6 1752  ax-7 1795  ax-8 1825  ax-9 1827  ax-10 1842  ax-11 1847  ax-12 1859  ax-13 2004  ax-ext 2432  ax-sep 4560  ax-nul 4568  ax-pow 4615  ax-pr 4676  ax-un 6565  ax-cnex 9537  ax-resscn 9538  ax-1cn 9539  ax-icn 9540  ax-addcl 9541  ax-addrcl 9542  ax-mulcl 9543  ax-mulrcl 9544  ax-mulcom 9545  ax-addass 9546  ax-mulass 9547  ax-distr 9548  ax-i2m1 9549  ax-1ne0 9550  ax-1rid 9551  ax-rnegex 9552  ax-rrecex 9553  ax-cnre 9554  ax-pre-lttri 9555  ax-pre-lttrn 9556  ax-pre-ltadd 9557  ax-pre-mulgt0 9558

This theorem depends on definitions:  df-bi 185  df-or 368  df-an 369  df-3or 972  df-3an 973  df-tru 1401  df-ex 1618  df-nf 1622  df-sb 1745  df-eu 2288  df-mo 2289  df-clab 2440  df-cleq 2446  df-clel 2449  df-nfc 2604  df-ne 2651  df-nel 2652  df-ral 2809  df-rex 2810  df-reu 2811  df-rmo 2812  df-rab 2813  df-v 3108  df-sbc 3325  df-csb 3421  df-dif 3464  df-un 3466  df-in 3468  df-ss 3475  df-pss 3477  df-nul 3784  df-if 3930  df-pw 4001  df-sn 4017  df-pr 4019  df-tp 4021  df-op 4023  df-uni 4236  df-iun 4317  df-br 4440  df-opab 4498  df-mpt 4499  df-tr 4533  df-eprel 4780  df-id 4784  df-po 4789  df-so 4790  df-fr 4827  df-we 4829  df-ord 4870  df-on 4871  df-lim 4872  df-suc 4873  df-xp 4994  df-rel 4995  df-cnv 4996  df-co 4997  df-dm 4998  df-rn 4999  df-res 5000  df-ima 5001  df-iota 5534  df-fun 5572  df-fn 5573  df-f 5574  df-f1 5575  df-fo 5576  df-f1o 5577  df-fv 5578  df-riota 6232  df-ov 6273  df-oprab 6274  df-mpt2 6275  df-om 6674  df-1st 6773  df-2nd 6774  df-recs 7034  df-rdg 7068  df-er 7303  df-map 7414  df-en 7510  df-dom 7511  df-sdom 7512  df-pnf 9619  df-mnf 9620  df-xr 9621  df-ltxr 9622  df-le 9623  df-sub 9798  df-neg 9799  df-nn 10532  df-2 10590  df-ndx 14719  df-slot 14720  df-base 14721  df-sets 14722  df-ress 14723  df-plusg 14797  df-0g 14931  df-mgm 16071  df-sgrp 16110  df-mnd 16120  df-grp 16256  df-subg 16397  df-ga 16527

This theorem is referenced by:  gaid2  16540