Theorem grpinvfng 12922

Description: Functionality of the group inverse function. (Contributed by Stefan O'Rear, 21-Mar-2015.)

Hypotheses

Ref	Expression
grpinvfn.b	|- B = ( Base ` G )
grpinvfn.n	|- N = ( invg ` G )

Assertion

Ref	Expression
grpinvfng	|- ( G e. V -> N Fn B )

Proof of Theorem grpinvfng

Dummy variables x y are mutually distinct and distinct from all other variables.

Step	Hyp	Ref	Expression
1		grpinvfn.b	. . . . . 6 |- B = ( Base ` G )
2		basfn 12522	. . . . . . 7 |- Base Fn _V
3		elex 2750	. . . . . . 7 |- ( G e. V -> G e. _V )
4		funfvex 5534	. . . . . . . 8 |- ( ( Fun Base /\ G e. dom Base ) -> ( Base ` G ) e. _V )
5	4	funfni 5318	. . . . . . 7 |- ( ( Base Fn _V /\ G e. _V ) -> ( Base ` G ) e. _V )
6	2, 3, 5	sylancr 414	. . . . . 6 |- ( G e. V -> ( Base ` G ) e. _V )
7	1, 6	eqeltrid 2264	. . . . 5 |- ( G e. V -> B e. _V )
8		riotaexg 5837	. . . . 5 |- ( B e. _V -> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) e. _V )
9	7, 8	syl 14	. . . 4 |- ( G e. V -> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) e. _V )
10	9	ralrimivw 2551	. . 3 |- ( G e. V -> A. x e. B ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) e. _V )
11		eqid 2177	. . . 4 |- ( x e. B |-> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) ) = ( x e. B |-> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) )
12	11	fnmpt 5344	. . 3 |- ( A. x e. B ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) e. _V -> ( x e. B |-> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) ) Fn B )
13	10, 12	syl 14	. 2 |- ( G e. V -> ( x e. B |-> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) ) Fn B )
14		eqid 2177	. . . 4 |- ( +g ` G ) = ( +g ` G )
15		eqid 2177	. . . 4 |- ( 0g ` G ) = ( 0g ` G )
16		grpinvfn.n	. . . 4 |- N = ( invg ` G )
17	1, 14, 15, 16	grpinvfvalg 12920	. . 3 |- ( G e. V -> N = ( x e. B |-> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) ) )
18	17	fneq1d 5308	. 2 |- ( G e. V -> ( N Fn B <-> ( x e. B |-> ( iota_ y e. B ( y ( +g ` G ) x ) = ( 0g ` G ) ) ) Fn B ) )
19	13, 18	mpbird 167	1 |- ( G e. V -> N Fn B )

Syntax hints:   -> wi 4   = wceq 1353   e. wcel 2148   A.wral 2455   _Vcvv 2739   |-> cmpt 4066   Fn wfn 5213   ` cfv 5218   iota_crio 5832  (class class class)co 5877   Basecbs 12464   +g cplusg 12538   0gc0g 12710   invgcminusg 12883

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-io 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-13 2150  ax-14 2151  ax-ext 2159  ax-coll 4120  ax-sep 4123  ax-pow 4176  ax-pr 4211  ax-un 4435  ax-cnex 7904  ax-resscn 7905  ax-1re 7907  ax-addrcl 7910

This theorem depends on definitions:  df-bi 117  df-3an 980  df-tru 1356  df-nf 1461  df-sb 1763  df-eu 2029  df-mo 2030  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-ral 2460  df-rex 2461  df-reu 2462  df-rab 2464  df-v 2741  df-sbc 2965  df-csb 3060  df-un 3135  df-in 3137  df-ss 3144  df-pw 3579  df-sn 3600  df-pr 3601  df-op 3603  df-uni 3812  df-int 3847  df-iun 3890  df-br 4006  df-opab 4067  df-mpt 4068  df-id 4295  df-xp 4634  df-rel 4635  df-cnv 4636  df-co 4637  df-dm 4638  df-rn 4639  df-res 4640  df-ima 4641  df-iota 5180  df-fun 5220  df-fn 5221  df-f 5222  df-f1 5223  df-fo 5224  df-f1o 5225  df-fv 5226  df-riota 5833  df-ov 5880  df-inn 8922  df-ndx 12467  df-slot 12468  df-base 12470  df-minusg 12886

This theorem is referenced by:  isgrpinv  12931  mulgval  12991  mulgfng  12992  invrfvald  13296