Theorem nmznsg 13766

Description: Any subgroup is a normal subgroup of its normalizer. (Contributed by Mario Carneiro, 19-Jan-2015.)

Hypotheses

Ref	Expression
elnmz.1	|- N = { x e. X | A. y e. X ( ( x .+ y ) e. S <-> ( y .+ x ) e. S ) }
nmzsubg.2	|- X = ( Base ` G )
nmzsubg.3	|- .+ = ( +g ` G )
nmznsg.4	|- H = ( G ↾s N )

Assertion

Ref	Expression
nmznsg	|- ( S e. (SubGrp ` G ) -> S e. (NrmSGrp ` H ) )

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

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

Proof of Theorem nmznsg

Dummy variables z w are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		id 19	. . 3 |- ( S e. (SubGrp ` G ) -> S e. (SubGrp ` G ) )
2		elnmz.1	. . . 4 |- N = { x e. X | A. y e. X ( ( x .+ y ) e. S <-> ( y .+ x ) e. S ) }
3		nmzsubg.2	. . . 4 |- X = ( Base ` G )
4		nmzsubg.3	. . . 4 |- .+ = ( +g ` G )
5	2, 3, 4	ssnmz 13764	. . 3 |- ( S e. (SubGrp ` G ) -> S C_ N )
6		subgrcl 13732	. . . . 5 |- ( S e. (SubGrp ` G ) -> G e. Grp )
7	2, 3, 4	nmzsubg 13763	. . . . 5 |- ( G e. Grp -> N e. (SubGrp ` G ) )
8	6, 7	syl 14	. . . 4 |- ( S e. (SubGrp ` G ) -> N e. (SubGrp ` G ) )
9		nmznsg.4	. . . . 5 |- H = ( G ↾s N )
10	9	subsubg 13750	. . . 4 |- ( N e. (SubGrp ` G ) -> ( S e. (SubGrp ` H ) <-> ( S e. (SubGrp ` G ) /\ S C_ N ) ) )
11	8, 10	syl 14	. . 3 |- ( S e. (SubGrp ` G ) -> ( S e. (SubGrp ` H ) <-> ( S e. (SubGrp ` G ) /\ S C_ N ) ) )
12	1, 5, 11	mpbir2and 950	. 2 |- ( S e. (SubGrp ` G ) -> S e. (SubGrp ` H ) )
13	2	ssrab3 3310	. . . . . 6 |- N C_ X
14	13	sseli 3220	. . . . 5 |- ( w e. N -> w e. X )
15	2	nmzbi 13762	. . . . 5 |- ( ( z e. N /\ w e. X ) -> ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) )
16	14, 15	sylan2 286	. . . 4 |- ( ( z e. N /\ w e. N ) -> ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) )
17	16	rgen2 2616	. . 3 |- A. z e. N A. w e. N ( ( z .+ w ) e. S <-> ( w .+ z ) e. S )
18	9	subgbas 13731	. . . . 5 |- ( N e. (SubGrp ` G ) -> N = ( Base ` H ) )
19	8, 18	syl 14	. . . 4 |- ( S e. (SubGrp ` G ) -> N = ( Base ` H ) )
20	19	raleqdv 2734	. . . 4 |- ( S e. (SubGrp ` G ) -> ( A. w e. N ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) <-> A. w e. ( Base ` H ) ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) ) )
21	19, 20	raleqbidv 2744	. . 3 |- ( S e. (SubGrp ` G ) -> ( A. z e. N A. w e. N ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) <-> A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) ) )
22	17, 21	mpbii 148	. 2 |- ( S e. (SubGrp ` G ) -> A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) )
23		eqid 2229	. . . 4 |- ( Base ` H ) = ( Base ` H )
24		eqid 2229	. . . 4 |- ( +g ` H ) = ( +g ` H )
25	23, 24	isnsg 13755	. . 3 |- ( S e. (NrmSGrp ` H ) <-> ( S e. (SubGrp ` H ) /\ A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z ( +g ` H ) w ) e. S <-> ( w ( +g ` H ) z ) e. S ) ) )
26	9	a1i 9	. . . . . . . . 9 |- ( S e. (SubGrp ` G ) -> H = ( G ↾s N ) )
27	4	a1i 9	. . . . . . . . 9 |- ( S e. (SubGrp ` G ) -> .+ = ( +g ` G ) )
28	26, 27, 8, 6	ressplusgd 13178	. . . . . . . 8 |- ( S e. (SubGrp ` G ) -> .+ = ( +g ` H ) )
29	28	oveqd 6024	. . . . . . 7 |- ( S e. (SubGrp ` G ) -> ( z .+ w ) = ( z ( +g ` H ) w ) )
30	29	eleq1d 2298	. . . . . 6 |- ( S e. (SubGrp ` G ) -> ( ( z .+ w ) e. S <-> ( z ( +g ` H ) w ) e. S ) )
31	28	oveqd 6024	. . . . . . 7 |- ( S e. (SubGrp ` G ) -> ( w .+ z ) = ( w ( +g ` H ) z ) )
32	31	eleq1d 2298	. . . . . 6 |- ( S e. (SubGrp ` G ) -> ( ( w .+ z ) e. S <-> ( w ( +g ` H ) z ) e. S ) )
33	30, 32	bibi12d 235	. . . . 5 |- ( S e. (SubGrp ` G ) -> ( ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) <-> ( ( z ( +g ` H ) w ) e. S <-> ( w ( +g ` H ) z ) e. S ) ) )
34	33	2ralbidv 2554	. . . 4 |- ( S e. (SubGrp ` G ) -> ( A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) <-> A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z ( +g ` H ) w ) e. S <-> ( w ( +g ` H ) z ) e. S ) ) )
35	34	anbi2d 464	. . 3 |- ( S e. (SubGrp ` G ) -> ( ( S e. (SubGrp ` H ) /\ A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) ) <-> ( S e. (SubGrp ` H ) /\ A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z ( +g ` H ) w ) e. S <-> ( w ( +g ` H ) z ) e. S ) ) ) )
36	25, 35	bitr4id 199	. 2 |- ( S e. (SubGrp ` G ) -> ( S e. (NrmSGrp ` H ) <-> ( S e. (SubGrp ` H ) /\ A. z e. ( Base ` H ) A. w e. ( Base ` H ) ( ( z .+ w ) e. S <-> ( w .+ z ) e. S ) ) ) )
37	12, 22, 36	mpbir2and 950	1 |- ( S e. (SubGrp ` G ) -> S e. (NrmSGrp ` H ) )

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1395   e. wcel 2200   A.wral 2508   {crab 2512   C_ wss 3197   ` cfv 5318  (class class class)co 6007   Basecbs 13048   ↾_s cress 13049   +g cplusg 13126   Grpcgrp 13549  SubGrpcsubg 13720  NrmSGrpcnsg 13721

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 617  ax-in2 618  ax-io 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-13 2202  ax-14 2203  ax-ext 2211  ax-coll 4199  ax-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-cnex 8101  ax-resscn 8102  ax-1cn 8103  ax-1re 8104  ax-icn 8105  ax-addcl 8106  ax-addrcl 8107  ax-mulcl 8108  ax-addcom 8110  ax-addass 8112  ax-i2m1 8115  ax-0lt1 8116  ax-0id 8118  ax-rnegex 8119  ax-pre-ltirr 8122  ax-pre-ltadd 8126

This theorem depends on definitions:  df-bi 117  df-3an 1004  df-tru 1398  df-fal 1401  df-nf 1507  df-sb 1809  df-eu 2080  df-mo 2081  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-ne 2401  df-nel 2496  df-ral 2513  df-rex 2514  df-reu 2515  df-rmo 2516  df-rab 2517  df-v 2801  df-sbc 3029  df-csb 3125  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-nul 3492  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-iun 3967  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-riota 5960  df-ov 6010  df-oprab 6011  df-mpo 6012  df-1st 6292  df-2nd 6293  df-pnf 8194  df-mnf 8195  df-ltxr 8197  df-inn 9122  df-2 9180  df-ndx 13051  df-slot 13052  df-base 13054  df-sets 13055  df-iress 13056  df-plusg 13139  df-0g 13307  df-mgm 13405  df-sgrp 13451  df-mnd 13466  df-grp 13552  df-minusg 13553  df-sbg 13554  df-subg 13723  df-nsg 13724

This theorem is referenced by: (None)