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Theorem mulgfng 13904
Description: Functionality of the group multiple operation. (Contributed by Mario Carneiro, 21-Mar-2015.) (Revised by Mario Carneiro, 2-Oct-2015.)
Hypotheses
Ref Expression
mulgfn.b |- B = ( Base ` G )
mulgfn.t |- .x. = (.g ` G )
Assertion
Ref Expression
mulgfng |- ( G e. V -> .x. Fn ( ZZ X. B ) )
Proof of Theorem mulgfng
Dummy variables u v n x are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 elex 2833 . . . . . . 7 |- ( G e. V -> G e. _V )
2 fn0g 13672 . . . . . . . 8 |- 0g Fn _V
3 funfvex 5707 . . . . . . . . 9 |- ( ( Fun 0g /\ G e. dom 0g ) -> ( 0g ` G ) e. _V )
43funfni 5478 . . . . . . . 8 |- ( ( 0g Fn _V /\ G e. _V ) -> ( 0g ` G ) e. _V )
52, 4mpan 428 . . . . . . 7 |- ( G e. _V -> ( 0g ` G ) e. _V )
61, 5syl 14 . . . . . 6 |- ( G e. V -> ( 0g ` G ) e. _V )
76ad2antrr 492 . . . . 5 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ n = 0 ) -> ( 0g ` G ) e. _V )
8 nnuz 9937 . . . . . . . . . 10 |- NN = ( ZZ>= ` 1 )
9 1zzd 9650 . . . . . . . . . 10 |- ( ( G e. V /\ x e. B ) -> 1 e. ZZ )
10 fvconst2g 5920 . . . . . . . . . . . . 13 |- ( ( x e. B /\ u e. NN ) -> ( ( NN X. { x } ) ` u ) = x )
11 simpl 109 . . . . . . . . . . . . 13 |- ( ( x e. B /\ u e. NN ) -> x e. B )
1210, 11eqeltrd 2315 . . . . . . . . . . . 12 |- ( ( x e. B /\ u e. NN ) -> ( ( NN X. { x } ) ` u ) e. B )
1312elexd 2835 . . . . . . . . . . 11 |- ( ( x e. B /\ u e. NN ) -> ( ( NN X. { x } ) ` u ) e. _V )
1413adantll 480 . . . . . . . . . 10 |- ( ( ( G e. V /\ x e. B ) /\ u e. NN ) -> ( ( NN X. { x } ) ` u ) e. _V )
15 simprl 535 . . . . . . . . . . 11 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> u e. _V )
16 plusgslid 13443 . . . . . . . . . . . . 13 |- ( +g = Slot ( +g ` ndx ) /\ ( +g ` ndx ) e. NN )
1716slotex 13357 . . . . . . . . . . . 12 |- ( G e. V -> ( +g ` G ) e. _V )
1817ad2antrr 492 . . . . . . . . . . 11 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> ( +g ` G ) e. _V )
19 simprr 537 . . . . . . . . . . 11 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> v e. _V )
20 ovexg 6109 . . . . . . . . . . 11 |- ( ( u e. _V /\ ( +g ` G ) e. _V /\ v e. _V ) -> ( u ( +g ` G ) v ) e. _V )
2115, 18, 19, 20syl3anc 1278 . . . . . . . . . 10 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> ( u ( +g ` G ) v ) e. _V )
228, 9, 14, 21seqf 10879 . . . . . . . . 9 |- ( ( G e. V /\ x e. B ) -> seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) : NN --> _V )
2322adantrl 482 . . . . . . . 8 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) : NN --> _V )
2423ad2antrr 492 . . . . . . 7 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ 0 < n ) -> seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) : NN --> _V )
25 simprl 535 . . . . . . . . 9 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> n e. ZZ )
2625ad2antrr 492 . . . . . . . 8 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ 0 < n ) -> n e. ZZ )
27 simpr 110 . . . . . . . 8 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ 0 < n ) -> 0 < n )
28 elnnz 9633 . . . . . . . 8 |- ( n e. NN <-> ( n e. ZZ /\ 0 < n ) )
2926, 27, 28sylanbrc 421 . . . . . . 7 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ 0 < n ) -> n e. NN )
3024, 29ffvelcdmd 5835 . . . . . 6 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ 0 < n ) -> ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) e. _V )
31 mulgfn.b . . . . . . . . . 10 |- B = ( Base ` G )
32 eqid 2238 . . . . . . . . . 10 |- ( invg ` G ) = ( invg ` G )
3331, 32grpinvfng 13826 . . . . . . . . 9 |- ( G e. V -> ( invg ` G ) Fn B )
34 basfn 13389 . . . . . . . . . . . 12 |- Base Fn _V
35 funfvex 5707 . . . . . . . . . . . . 13 |- ( ( Fun Base /\ G e. dom Base ) -> ( Base ` G ) e. _V )
3635funfni 5478 . . . . . . . . . . . 12 |- ( ( Base Fn _V /\ G e. _V ) -> ( Base ` G ) e. _V )
3734, 36mpan 428 . . . . . . . . . . 11 |- ( G e. _V -> ( Base ` G ) e. _V )
3831, 37eqeltrid 2325 . . . . . . . . . 10 |- ( G e. _V -> B e. _V )
391, 38syl 14 . . . . . . . . 9 |- ( G e. V -> B e. _V )
40 fnex 5928 . . . . . . . . 9 |- ( ( ( invg ` G ) Fn B /\ B e. _V ) -> ( invg ` G ) e. _V )
4133, 39, 40syl2anc 415 . . . . . . . 8 |- ( G e. V -> ( invg ` G ) e. _V )
4241ad3antrrr 496 . . . . . . 7 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> ( invg ` G ) e. _V )
4323ad2antrr 492 . . . . . . . 8 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) : NN --> _V )
4425znegcld 9749 . . . . . . . . . 10 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> -u n e. ZZ )
4544ad2antrr 492 . . . . . . . . 9 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> -u n e. ZZ )
46 simplr 533 . . . . . . . . . . 11 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> -. n = 0 )
47 simpr 110 . . . . . . . . . . 11 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> -. 0 < n )
48 ztri3or0 9665 . . . . . . . . . . . . 13 |- ( n e. ZZ -> ( n < 0 \/ n = 0 \/ 0 < n ) )
4925, 48syl 14 . . . . . . . . . . . 12 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> ( n < 0 \/ n = 0 \/ 0 < n ) )
5049ad2antrr 492 . . . . . . . . . . 11 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> ( n < 0 \/ n = 0 \/ 0 < n ) )
5146, 47, 50ecase23d 1391 . . . . . . . . . 10 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> n < 0 )
5225zred 9747 . . . . . . . . . . . 12 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> n e. RR )
5352ad2antrr 492 . . . . . . . . . . 11 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> n e. RR )
5453lt0neg1d 8833 . . . . . . . . . 10 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> ( n < 0 <-> 0 < -u n ) )
5551, 54mpbid 147 . . . . . . . . 9 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> 0 < -u n )
56 elnnz 9633 . . . . . . . . 9 |- ( -u n e. NN <-> ( -u n e. ZZ /\ 0 < -u n ) )
5745, 55, 56sylanbrc 421 . . . . . . . 8 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> -u n e. NN )
5843, 57ffvelcdmd 5835 . . . . . . 7 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) e. _V )
59 fvexg 5709 . . . . . . 7 |- ( ( ( invg ` G ) e. _V /\ ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) e. _V ) -> ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) e. _V )
6042, 58, 59syl2anc 415 . . . . . 6 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) e. _V )
61 0zd 9635 . . . . . . 7 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) -> 0 e. ZZ )
62 simplrl 541 . . . . . . 7 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) -> n e. ZZ )
63 zdclt 9701 . . . . . . 7 |- ( ( 0 e. ZZ /\ n e. ZZ ) -> DECID 0 < n )
6461, 62, 63syl2anc 415 . . . . . 6 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) -> DECID 0 < n )
6530, 60, 64ifcldadc 3667 . . . . 5 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) -> if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) e. _V )
66 0zd 9635 . . . . . 6 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> 0 e. ZZ )
67 zdceq 9699 . . . . . 6 |- ( ( n e. ZZ /\ 0 e. ZZ ) -> DECID n = 0 )
6825, 66, 67syl2anc 415 . . . . 5 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> DECID n = 0 )
697, 65, 68ifcldadc 3667 . . . 4 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) e. _V )
7069ralrimivva 2632 . . 3 |- ( G e. V -> A. n e. ZZ A. x e. B if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) e. _V )
71 eqid 2238 . . . 4 |- ( n e. ZZ , x e. B |-> if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) ) = ( n e. ZZ , x e. B |-> if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) )
7271fnmpo 6428 . . 3 |- ( A. n e. ZZ A. x e. B if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) e. _V -> ( n e. ZZ , x e. B |-> if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) ) Fn ( ZZ X. B ) )
7370, 72syl 14 . 2 |- ( G e. V -> ( n e. ZZ , x e. B |-> if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) ) Fn ( ZZ X. B ) )
74 eqid 2238 . . . 4 |- ( +g ` G ) = ( +g ` G )
75 eqid 2238 . . . 4 |- ( 0g ` G ) = ( 0g ` G )
76 mulgfn.t . . . 4 |- .x. = (.g ` G )
7731, 74, 75, 32, 76mulgfvalg 13901 . . 3 |- ( G e. V -> .x. = ( n e. ZZ , x e. B |-> if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) ) )
7877fneq1d 5466 . 2 |- ( G e. V -> ( .x. Fn ( ZZ X. B ) <-> ( n e. ZZ , x e. B |-> if ( n = 0 , ( 0g ` G ) , if ( 0 < n , ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` n ) , ( ( invg ` G ) ` ( seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) ` -u n ) ) ) ) ) Fn ( ZZ X. B ) ) )
7973, 78mpbird 167 1 |- ( G e. V -> .x. Fn ( ZZ X. B ) )
Colors of variables: wff set class
Syntax hints:   -. wn 3   -> wi 4   /\ wa 104  DECID wdc 846   \/ w3o 1008   = wceq 1402   e. wcel 2209   A.wral 2528   _Vcvv 2821   ifcif 3635   {csn 3705   class class class wbr 4125   X. cxp 4767   Fn wfn 5367   -->wf 5368   ` cfv 5372  (class class class)co 6075   e. cmpo 6077   RRcr 8168   0cc0 8169   1c1 8170   < clt 8350   -ucneg 8488   NNcn 9283   ZZcz 9623   seqcseq 10862   Basecbs 13330   +g cplusg 13408   0gc0g 13587   invgcminusg 13783  .gcmg 13899
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 623  ax-in2 624  ax-io 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-coll 4241  ax-sep 4244  ax-nul 4254  ax-pow 4306  ax-pr 4341  ax-un 4573  ax-setind 4679  ax-iinf 4730  ax-cnex 8260  ax-resscn 8261  ax-1cn 8262  ax-1re 8263  ax-icn 8264  ax-addcl 8265  ax-addrcl 8266  ax-mulcl 8267  ax-addcom 8269  ax-addass 8271  ax-distr 8273  ax-i2m1 8274  ax-0lt1 8275  ax-0id 8277  ax-rnegex 8278  ax-cnre 8280  ax-pre-ltirr 8281  ax-pre-ltwlin 8282  ax-pre-lttrn 8283  ax-pre-ltadd 8285
This theorem depends on definitions:  df-bi 117  df-dc 847  df-3or 1010  df-3an 1011  df-tru 1405  df-fal 1408  df-nf 1514  df-sb 1816  df-eu 2089  df-mo 2090  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ne 2421  df-nel 2516  df-ral 2533  df-rex 2534  df-reu 2535  df-rab 2537  df-v 2823  df-sbc 3052  df-csb 3148  df-dif 3222  df-un 3224  df-in 3226  df-ss 3233  df-nul 3521  df-if 3636  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-uni 3931  df-int 3966  df-iun 4009  df-br 4126  df-opab 4188  df-mpt 4189  df-tr 4225  df-id 4433  df-iord 4506  df-on 4508  df-ilim 4509  df-suc 4511  df-iom 4733  df-xp 4775  df-rel 4776  df-cnv 4777  df-co 4778  df-dm 4779  df-rn 4780  df-res 4781  df-ima 4782  df-iota 5332  df-fun 5374  df-fn 5375  df-f 5376  df-f1 5377  df-fo 5378  df-f1o 5379  df-fv 5380  df-riota 6028  df-ov 6078  df-oprab 6079  df-mpo 6080  df-1st 6364  df-2nd 6365  df-recs 6566  df-frec 6652  df-pnf 8352  df-mnf 8353  df-xr 8354  df-ltxr 8355  df-le 8356  df-sub 8489  df-neg 8490  df-inn 9284  df-2 9342  df-n0 9543  df-z 9624  df-uz 9901  df-seqfrec 10863  df-ndx 13333  df-slot 13334  df-base 13336  df-plusg 13421  df-0g 13589  df-minusg 13786  df-mulg 13900
This theorem is referenced by: (None)
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