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Theorem mulgfng 13841
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 2825 . . . . . . 7 |- ( G e. V -> G e. _V )
2 fn0g 13588 . . . . . . . 8 |- 0g Fn _V
3 funfvex 5687 . . . . . . . . 9 |- ( ( Fun 0g /\ G e. dom 0g ) -> ( 0g ` G ) e. _V )
43funfni 5458 . . . . . . . 8 |- ( ( 0g Fn _V /\ G e. _V ) -> ( 0g ` G ) e. _V )
52, 4mpan 424 . . . . . . 7 |- ( G e. _V -> ( 0g ` G ) e. _V )
61, 5syl 14 . . . . . 6 |- ( G e. V -> ( 0g ` G ) e. _V )
76ad2antrr 488 . . . . 5 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ n = 0 ) -> ( 0g ` G ) e. _V )
8 nnuz 9890 . . . . . . . . . 10 |- NN = ( ZZ>= ` 1 )
9 1zzd 9604 . . . . . . . . . 10 |- ( ( G e. V /\ x e. B ) -> 1 e. ZZ )
10 fvconst2g 5898 . . . . . . . . . . . . 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 2309 . . . . . . . . . . . 12 |- ( ( x e. B /\ u e. NN ) -> ( ( NN X. { x } ) ` u ) e. B )
1312elexd 2827 . . . . . . . . . . 11 |- ( ( x e. B /\ u e. NN ) -> ( ( NN X. { x } ) ` u ) e. _V )
1413adantll 476 . . . . . . . . . 10 |- ( ( ( G e. V /\ x e. B ) /\ u e. NN ) -> ( ( NN X. { x } ) ` u ) e. _V )
15 simprl 531 . . . . . . . . . . 11 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> u e. _V )
16 plusgslid 13325 . . . . . . . . . . . . 13 |- ( +g = Slot ( +g ` ndx ) /\ ( +g ` ndx ) e. NN )
1716slotex 13239 . . . . . . . . . . . 12 |- ( G e. V -> ( +g ` G ) e. _V )
1817ad2antrr 488 . . . . . . . . . . 11 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> ( +g ` G ) e. _V )
19 simprr 533 . . . . . . . . . . 11 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> v e. _V )
20 ovexg 6084 . . . . . . . . . . 11 |- ( ( u e. _V /\ ( +g ` G ) e. _V /\ v e. _V ) -> ( u ( +g ` G ) v ) e. _V )
2115, 18, 19, 20syl3anc 1274 . . . . . . . . . 10 |- ( ( ( G e. V /\ x e. B ) /\ ( u e. _V /\ v e. _V ) ) -> ( u ( +g ` G ) v ) e. _V )
228, 9, 14, 21seqf 10826 . . . . . . . . 9 |- ( ( G e. V /\ x e. B ) -> seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) : NN --> _V )
2322adantrl 478 . . . . . . . 8 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) : NN --> _V )
2423ad2antrr 488 . . . . . . 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 531 . . . . . . . . 9 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> n e. ZZ )
2625ad2antrr 488 . . . . . . . 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 9587 . . . . . . . 8 |- ( n e. NN <-> ( n e. ZZ /\ 0 < n ) )
2926, 27, 28sylanbrc 417 . . . . . . 7 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ 0 < n ) -> n e. NN )
3024, 29ffvelcdmd 5813 . . . . . 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 2232 . . . . . . . . . 10 |- ( invg ` G ) = ( invg ` G )
3331, 32grpinvfng 13757 . . . . . . . . 9 |- ( G e. V -> ( invg ` G ) Fn B )
34 basfn 13271 . . . . . . . . . . . 12 |- Base Fn _V
35 funfvex 5687 . . . . . . . . . . . . 13 |- ( ( Fun Base /\ G e. dom Base ) -> ( Base ` G ) e. _V )
3635funfni 5458 . . . . . . . . . . . 12 |- ( ( Base Fn _V /\ G e. _V ) -> ( Base ` G ) e. _V )
3734, 36mpan 424 . . . . . . . . . . 11 |- ( G e. _V -> ( Base ` G ) e. _V )
3831, 37eqeltrid 2319 . . . . . . . . . 10 |- ( G e. _V -> B e. _V )
391, 38syl 14 . . . . . . . . 9 |- ( G e. V -> B e. _V )
40 fnex 5906 . . . . . . . . 9 |- ( ( ( invg ` G ) Fn B /\ B e. _V ) -> ( invg ` G ) e. _V )
4133, 39, 40syl2anc 411 . . . . . . . 8 |- ( G e. V -> ( invg ` G ) e. _V )
4241ad3antrrr 492 . . . . . . 7 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> ( invg ` G ) e. _V )
4323ad2antrr 488 . . . . . . . 8 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> seq 1 ( ( +g ` G ) , ( NN X. { x } ) ) : NN --> _V )
4425znegcld 9702 . . . . . . . . . 10 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> -u n e. ZZ )
4544ad2antrr 488 . . . . . . . . 9 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> -u n e. ZZ )
46 simplr 529 . . . . . . . . . . 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 9619 . . . . . . . . . . . . 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 488 . . . . . . . . . . 11 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> ( n < 0 \/ n = 0 \/ 0 < n ) )
5146, 47, 50ecase23d 1387 . . . . . . . . . 10 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> n < 0 )
5225zred 9700 . . . . . . . . . . . 12 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> n e. RR )
5352ad2antrr 488 . . . . . . . . . . 11 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> n e. RR )
5453lt0neg1d 8789 . . . . . . . . . 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 9587 . . . . . . . . 9 |- ( -u n e. NN <-> ( -u n e. ZZ /\ 0 < -u n ) )
5745, 55, 56sylanbrc 417 . . . . . . . 8 |- ( ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) /\ -. 0 < n ) -> -u n e. NN )
5843, 57ffvelcdmd 5813 . . . . . . 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 5689 . . . . . . 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 411 . . . . . 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 9589 . . . . . . 7 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) -> 0 e. ZZ )
62 simplrl 537 . . . . . . 7 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) -> n e. ZZ )
63 zdclt 9655 . . . . . . 7 |- ( ( 0 e. ZZ /\ n e. ZZ ) -> DECID 0 < n )
6461, 62, 63syl2anc 411 . . . . . 6 |- ( ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) /\ -. n = 0 ) -> DECID 0 < n )
6530, 60, 64ifcldadc 3652 . . . . 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 9589 . . . . . 6 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> 0 e. ZZ )
67 zdceq 9653 . . . . . 6 |- ( ( n e. ZZ /\ 0 e. ZZ ) -> DECID n = 0 )
6825, 66, 67syl2anc 411 . . . . 5 |- ( ( G e. V /\ ( n e. ZZ /\ x e. B ) ) -> DECID n = 0 )
697, 65, 68ifcldadc 3652 . . . 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 2624 . . 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 2232 . . . 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 6398 . . 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 2232 . . . 4 |- ( +g ` G ) = ( +g ` G )
75 eqid 2232 . . . 4 |- ( 0g ` G ) = ( 0g ` G )
76 mulgfn.t . . . 4 |- .x. = (.g ` G )
7731, 74, 75, 32, 76mulgfvalg 13838 . . 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 5446 . 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 842   \/ w3o 1004   = wceq 1398   e. wcel 2203   A.wral 2520   _Vcvv 2813   ifcif 3620   {csn 3689   class class class wbr 4109   X. cxp 4747   Fn wfn 5347   -->wf 5348   ` cfv 5352  (class class class)co 6050   e. cmpo 6052   RRcr 8126   0cc0 8127   1c1 8128   < clt 8308   -ucneg 8445   NNcn 9237   ZZcz 9577   seqcseq 10809   Basecbs 13212   +g cplusg 13290   0gc0g 13469   invgcminusg 13714  .gcmg 13836
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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-13 2205  ax-14 2206  ax-ext 2214  ax-coll 4225  ax-sep 4228  ax-nul 4236  ax-pow 4287  ax-pr 4322  ax-un 4554  ax-setind 4659  ax-iinf 4710  ax-cnex 8218  ax-resscn 8219  ax-1cn 8220  ax-1re 8221  ax-icn 8222  ax-addcl 8223  ax-addrcl 8224  ax-mulcl 8225  ax-addcom 8227  ax-addass 8229  ax-distr 8231  ax-i2m1 8232  ax-0lt1 8233  ax-0id 8235  ax-rnegex 8236  ax-cnre 8238  ax-pre-ltirr 8239  ax-pre-ltwlin 8240  ax-pre-lttrn 8241  ax-pre-ltadd 8243
This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2083  df-mo 2084  df-clab 2219  df-cleq 2225  df-clel 2228  df-nfc 2373  df-ne 2413  df-nel 2508  df-ral 2525  df-rex 2526  df-reu 2527  df-rab 2529  df-v 2815  df-sbc 3043  df-csb 3139  df-dif 3213  df-un 3215  df-in 3217  df-ss 3224  df-nul 3509  df-if 3621  df-pw 3671  df-sn 3695  df-pr 3696  df-op 3698  df-uni 3915  df-int 3950  df-iun 3993  df-br 4110  df-opab 4172  df-mpt 4173  df-tr 4209  df-id 4414  df-iord 4487  df-on 4489  df-ilim 4490  df-suc 4492  df-iom 4713  df-xp 4755  df-rel 4756  df-cnv 4757  df-co 4758  df-dm 4759  df-rn 4760  df-res 4761  df-ima 4762  df-iota 5312  df-fun 5354  df-fn 5355  df-f 5356  df-f1 5357  df-fo 5358  df-f1o 5359  df-fv 5360  df-riota 6003  df-ov 6053  df-oprab 6054  df-mpo 6055  df-1st 6334  df-2nd 6335  df-recs 6536  df-frec 6622  df-pnf 8310  df-mnf 8311  df-xr 8312  df-ltxr 8313  df-le 8314  df-sub 8446  df-neg 8447  df-inn 9238  df-2 9296  df-n0 9497  df-z 9578  df-uz 9854  df-seqfrec 10810  df-ndx 13215  df-slot 13216  df-base 13218  df-plusg 13303  df-0g 13471  df-minusg 13717  df-mulg 13837
This theorem is referenced by: (None)
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