Theorem expghmap 14742

Description: Exponentiation is a group homomorphism from addition to multiplication. (Contributed by Mario Carneiro, 18-Jun-2015.) (Revised by AV, 10-Jun-2019.) (Revised by Jim Kingdon, 11-Sep-2025.)

Hypotheses

Ref	Expression
expghm.m	|- M = (mulGrp ` ℂfld )
expghmap.u	|- U = ( M ↾s { z e. CC | z # 0 } )

Assertion

Ref	Expression
expghmap	|- ( ( A e. CC /\ A # 0 ) -> ( x e. ZZ |-> ( A ^ x ) ) e. (ℤring GrpHom U ) )

Distinct variable group:   x, A, z

Allowed substitution hints:   U( x, z)   M( x, z)

Proof of Theorem expghmap

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

Step	Hyp	Ref	Expression
1		expclzaplem 10921	. . . 4 |- ( ( A e. CC /\ A # 0 /\ x e. ZZ ) -> ( A ^ x ) e. { z e. CC | z # 0 } )
2	1	3expa 1230	. . 3 |- ( ( ( A e. CC /\ A # 0 ) /\ x e. ZZ ) -> ( A ^ x ) e. { z e. CC | z # 0 } )
3	2	fmpttd 5831	. 2 |- ( ( A e. CC /\ A # 0 ) -> ( x e. ZZ |-> ( A ^ x ) ) : ZZ --> { z e. CC | z # 0 } )
4		expaddzap 10941	. . . . 5 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( A ^ ( u + v ) ) = ( ( A ^ u ) x. ( A ^ v ) ) )
5		eqid 2232	. . . . . 6 |- ( x e. ZZ |-> ( A ^ x ) ) = ( x e. ZZ |-> ( A ^ x ) )
6		oveq2 6057	. . . . . 6 |- ( x = ( u + v ) -> ( A ^ x ) = ( A ^ ( u + v ) ) )
7		zaddcl 9613	. . . . . . 7 |- ( ( u e. ZZ /\ v e. ZZ ) -> ( u + v ) e. ZZ )
8	7	adantl 277	. . . . . 6 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( u + v ) e. ZZ )
9		simpll 527	. . . . . . 7 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> A e. CC )
10		simplr 529	. . . . . . 7 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> A # 0 )
11	9, 10, 8	expclzapd 11036	. . . . . 6 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( A ^ ( u + v ) ) e. CC )
12	5, 6, 8, 11	fvmptd3 5770	. . . . 5 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( A ^ ( u + v ) ) )
13		oveq2 6057	. . . . . . 7 |- ( x = u -> ( A ^ x ) = ( A ^ u ) )
14		simprl 531	. . . . . . 7 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> u e. ZZ )
15	9, 10, 14	expclzapd 11036	. . . . . . 7 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( A ^ u ) e. CC )
16	5, 13, 14, 15	fvmptd3 5770	. . . . . 6 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) = ( A ^ u ) )
17		oveq2 6057	. . . . . . 7 |- ( x = v -> ( A ^ x ) = ( A ^ v ) )
18		simprr 533	. . . . . . 7 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> v e. ZZ )
19	9, 10, 18	expclzapd 11036	. . . . . . 7 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( A ^ v ) e. CC )
20	5, 17, 18, 19	fvmptd3 5770	. . . . . 6 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) = ( A ^ v ) )
21	16, 20	oveq12d 6067	. . . . 5 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) = ( ( A ^ u ) x. ( A ^ v ) ) )
22	4, 12, 21	3eqtr4d 2275	. . . 4 |- ( ( ( A e. CC /\ A # 0 ) /\ ( u e. ZZ /\ v e. ZZ ) ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) )
23	22	ralrimivva 2624	. . 3 |- ( ( A e. CC /\ A # 0 ) -> A. u e. ZZ A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) )
24		simplr 529	. . . . . . . . 9 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> u e. ZZ )
25	15	anassrs 400	. . . . . . . . 9 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( A ^ u ) e. CC )
26	5, 13, 24, 25	fvmptd3 5770	. . . . . . . 8 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) = ( A ^ u ) )
27	26, 25	eqeltrd 2309	. . . . . . 7 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) e. CC )
28		simpr 110	. . . . . . . . 9 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> v e. ZZ )
29	19	anassrs 400	. . . . . . . . 9 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( A ^ v ) e. CC )
30	5, 17, 28, 29	fvmptd3 5770	. . . . . . . 8 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) = ( A ^ v ) )
31	30, 29	eqeltrd 2309	. . . . . . 7 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) e. CC )
32	27, 31	mulcld 8290	. . . . . . 7 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) e. CC )
33		oveq1 6056	. . . . . . . 8 |- ( r = ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) -> ( r x. s ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. s ) )
34		oveq2 6057	. . . . . . . 8 |- ( s = ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) -> ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. s ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) )
35		eqid 2232	. . . . . . . 8 |- ( r e. CC , s e. CC |-> ( r x. s ) ) = ( r e. CC , s e. CC |-> ( r x. s ) )
36	33, 34, 35	ovmpog 6187	. . . . . . 7 |- ( ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) e. CC /\ ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) e. CC /\ ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) e. CC ) -> ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) )
37	27, 31, 32, 36	syl3anc 1274	. . . . . 6 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) )
38	37	eqeq2d 2244	. . . . 5 |- ( ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) /\ v e. ZZ ) -> ( ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) <-> ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) ) )
39	38	ralbidva 2538	. . . 4 |- ( ( ( A e. CC /\ A # 0 ) /\ u e. ZZ ) -> ( A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) <-> A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) ) )
40	39	ralbidva 2538	. . 3 |- ( ( A e. CC /\ A # 0 ) -> ( A. u e. ZZ A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) <-> A. u e. ZZ A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) x. ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) ) )
41	23, 40	mpbird 167	. 2 |- ( ( A e. CC /\ A # 0 ) -> A. u e. ZZ A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) )
42		zringgrp 14730	. . . 4 |- ℤring e. Grp
43		cnring 14705	. . . . 5 |- ℂfld e. Ring
44		cnfldui 14724	. . . . . 6 |- { z e. CC | z # 0 } = (Unit ` ℂfld )
45		expghmap.u	. . . . . . 7 |- U = ( M ↾s { z e. CC | z # 0 } )
46		expghm.m	. . . . . . . 8 |- M = (mulGrp ` ℂfld )
47	46	oveq1i 6059	. . . . . . 7 |- ( M ↾s { z e. CC | z # 0 } ) = ( (mulGrp ` ℂfld ) ↾s { z e. CC | z # 0 } )
48	45, 47	eqtri 2253	. . . . . 6 |- U = ( (mulGrp ` ℂfld ) ↾s { z e. CC | z # 0 } )
49	44, 48	unitgrp 14250	. . . . 5 |- (ℂfld e. Ring -> U e. Grp )
50	43, 49	ax-mp 5	. . . 4 |- U e. Grp
51	42, 50	pm3.2i 272	. . 3 |- (ℤring e. Grp /\ U e. Grp )
52		zringbas 14731	. . . 4 |- ZZ = ( Base ` ℤring )
53	45	a1i 9	. . . . . 6 |- ( T. -> U = ( M ↾s { z e. CC | z # 0 } ) )
54		cnfldbas 14695	. . . . . . . 8 |- CC = ( Base ` ℂfld )
55	46, 54	mgpbasg 14059	. . . . . . 7 |- (ℂfld e. Ring -> CC = ( Base ` M ) )
56	43, 55	mp1i 10	. . . . . 6 |- ( T. -> CC = ( Base ` M ) )
57	46	mgpex 14058	. . . . . . 7 |- (ℂfld e. Ring -> M e. _V )
58	43, 57	mp1i 10	. . . . . 6 |- ( T. -> M e. _V )
59		apsscn 8917	. . . . . . 7 |- { z e. CC | z # 0 } C_ CC
60	59	a1i 9	. . . . . 6 |- ( T. -> { z e. CC | z # 0 } C_ CC )
61	53, 56, 58, 60	ressbas2d 13270	. . . . 5 |- ( T. -> { z e. CC | z # 0 } = ( Base ` U ) )
62	61	mptru 1407	. . . 4 |- { z e. CC | z # 0 } = ( Base ` U )
63		zringplusg 14732	. . . 4 |- + = ( +g ` ℤring )
64		mpocnfldmul 14698	. . . . . . . 8 |- ( r e. CC , s e. CC |-> ( r x. s ) ) = ( .r ` ℂfld )
65	46, 64	mgpplusgg 14057	. . . . . . 7 |- (ℂfld e. Ring -> ( r e. CC , s e. CC |-> ( r x. s ) ) = ( +g ` M ) )
66	43, 65	mp1i 10	. . . . . 6 |- ( T. -> ( r e. CC , s e. CC |-> ( r x. s ) ) = ( +g ` M ) )
67		cnex 8247	. . . . . . . 8 |- CC e. _V
68	67	rabex 4255	. . . . . . 7 |- { z e. CC | z # 0 } e. _V
69	68	a1i 9	. . . . . 6 |- ( T. -> { z e. CC | z # 0 } e. _V )
70	53, 66, 69, 58	ressplusgd 13331	. . . . 5 |- ( T. -> ( r e. CC , s e. CC |-> ( r x. s ) ) = ( +g ` U ) )
71	70	mptru 1407	. . . 4 |- ( r e. CC , s e. CC |-> ( r x. s ) ) = ( +g ` U )
72	52, 62, 63, 71	isghm 13949	. . 3 |- ( ( x e. ZZ |-> ( A ^ x ) ) e. (ℤring GrpHom U ) <-> ( (ℤring e. Grp /\ U e. Grp ) /\ ( ( x e. ZZ |-> ( A ^ x ) ) : ZZ --> { z e. CC | z # 0 } /\ A. u e. ZZ A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) ) ) )
73	51, 72	mpbiran 949	. 2 |- ( ( x e. ZZ |-> ( A ^ x ) ) e. (ℤring GrpHom U ) <-> ( ( x e. ZZ |-> ( A ^ x ) ) : ZZ --> { z e. CC | z # 0 } /\ A. u e. ZZ A. v e. ZZ ( ( x e. ZZ |-> ( A ^ x ) ) ` ( u + v ) ) = ( ( ( x e. ZZ |-> ( A ^ x ) ) ` u ) ( r e. CC , s e. CC |-> ( r x. s ) ) ( ( x e. ZZ |-> ( A ^ x ) ) ` v ) ) ) )
74	3, 41, 73	sylanbrc 417	1 |- ( ( A e. CC /\ A # 0 ) -> ( x e. ZZ |-> ( A ^ x ) ) e. (ℤring GrpHom U ) )

Syntax hints:   -> wi 4   /\ wa 104   = wceq 1398   T. wtru 1399   e. wcel 2203   A.wral 2520   {crab 2524   _Vcvv 2812   C_ wss 3210   class class class wbr 4108   |-> cmpt 4170   -->wf 5347   ` cfv 5351  (class class class)co 6049   e. cmpo 6051   CCcc 8121   0cc0 8123   + caddc 8126   x. cmul 8128   # cap 8851   ZZcz 9573   ^cexp 10896   Basecbs 13201   ↾_s cress 13202   +g cplusg 13279   Grpcgrp 13702   GrpHom cghm 13946  mulGrpcmgp 14053   Ringcrg 14129  ℂ_fldccnfld 14691  ℤ_ringczring 14725

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 4224  ax-sep 4227  ax-nul 4235  ax-pow 4286  ax-pr 4321  ax-un 4553  ax-setind 4658  ax-iinf 4709  ax-cnex 8214  ax-resscn 8215  ax-1cn 8216  ax-1re 8217  ax-icn 8218  ax-addcl 8219  ax-addrcl 8220  ax-mulcl 8221  ax-mulrcl 8222  ax-addcom 8223  ax-mulcom 8224  ax-addass 8225  ax-mulass 8226  ax-distr 8227  ax-i2m1 8228  ax-0lt1 8229  ax-1rid 8230  ax-0id 8231  ax-rnegex 8232  ax-precex 8233  ax-cnre 8234  ax-pre-ltirr 8235  ax-pre-ltwlin 8236  ax-pre-lttrn 8237  ax-pre-apti 8238  ax-pre-ltadd 8239  ax-pre-mulgt0 8240  ax-pre-mulext 8241  ax-addf 8245  ax-mulf 8246

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-rmo 2528  df-rab 2529  df-v 2814  df-sbc 3042  df-csb 3138  df-dif 3212  df-un 3214  df-in 3216  df-ss 3223  df-nul 3508  df-if 3620  df-pw 3670  df-sn 3694  df-pr 3695  df-tp 3696  df-op 3697  df-uni 3914  df-int 3949  df-iun 3992  df-br 4109  df-opab 4171  df-mpt 4172  df-tr 4208  df-id 4413  df-po 4416  df-iso 4417  df-iord 4486  df-on 4488  df-ilim 4489  df-suc 4491  df-iom 4712  df-xp 4754  df-rel 4755  df-cnv 4756  df-co 4757  df-dm 4758  df-rn 4759  df-res 4760  df-ima 4761  df-iota 5311  df-fun 5353  df-fn 5354  df-f 5355  df-f1 5356  df-fo 5357  df-f1o 5358  df-fv 5359  df-riota 6002  df-ov 6052  df-oprab 6053  df-mpo 6054  df-1st 6333  df-2nd 6334  df-tpos 6475  df-recs 6535  df-frec 6621  df-pnf 8306  df-mnf 8307  df-xr 8308  df-ltxr 8309  df-le 8310  df-sub 8442  df-neg 8443  df-reap 8845  df-ap 8852  df-div 8943  df-inn 9234  df-2 9292  df-3 9293  df-4 9294  df-5 9295  df-6 9296  df-7 9297  df-8 9298  df-9 9299  df-n0 9493  df-z 9574  df-dec 9706  df-uz 9850  df-rp 9983  df-fz 10339  df-seqfrec 10806  df-exp 10897  df-cj 11520  df-abs 11677  df-struct 13203  df-ndx 13204  df-slot 13205  df-base 13207  df-sets 13208  df-iress 13209  df-plusg 13292  df-mulr 13293  df-starv 13294  df-tset 13298  df-ple 13299  df-ds 13301  df-unif 13302  df-0g 13460  df-topgen 13462  df-mgm 13558  df-sgrp 13604  df-mnd 13619  df-grp 13705  df-minusg 13706  df-subg 13876  df-ghm 13947  df-cmn 13992  df-abl 13993  df-mgp 14054  df-ur 14093  df-srg 14097  df-ring 14131  df-cring 14132  df-oppr 14201  df-dvdsr 14222  df-unit 14223  df-subrg 14353  df-bl 14681  df-mopn 14682  df-fg 14684  df-metu 14685  df-cnfld 14692  df-zring 14726

This theorem is referenced by:  lgseisenlem4  15933