Theorem gsumfzcl 13518

Description: Closure of a finite group sum. (Contributed by Mario Carneiro, 15-Dec-2014.) (Revised by AV, 3-Jun-2019.) (Revised by Jim Kingdon, 16-Aug-2025.)

Hypotheses

Ref	Expression
gsumcl.b	|- B = ( Base ` G )
gsumcl.z	|- .0. = ( 0g ` G )
gsumfzcl.g	|- ( ph -> G e. Mnd )
gsumfzcl.m	|- ( ph -> M e. ZZ )
gsumfzcl.n	|- ( ph -> N e. ZZ )
gsumfzcl.f	|- ( ph -> F : ( M ... N ) --> B )

Assertion

Ref	Expression
gsumfzcl	|- ( ph -> ( G gsumg F ) e. B )

Proof of Theorem gsumfzcl

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

Step	Hyp	Ref	Expression
1		gsumcl.b	. . . . . 6 |- B = ( Base ` G )
2		gsumcl.z	. . . . . 6 |- .0. = ( 0g ` G )
3		eqid 2229	. . . . . 6 |- ( +g ` G ) = ( +g ` G )
4		gsumfzcl.g	. . . . . 6 |- ( ph -> G e. Mnd )
5		gsumfzcl.m	. . . . . 6 |- ( ph -> M e. ZZ )
6		gsumfzcl.n	. . . . . 6 |- ( ph -> N e. ZZ )
7		gsumfzcl.f	. . . . . 6 |- ( ph -> F : ( M ... N ) --> B )
8	1, 2, 3, 4, 5, 6, 7	gsumfzval 13410	. . . . 5 |- ( ph -> ( G gsumg F ) = if ( N < M , .0. , ( seq M ( ( +g ` G ) , F ) ` N ) ) )
9	8	adantr 276	. . . 4 |- ( ( ph /\ N < M ) -> ( G gsumg F ) = if ( N < M , .0. , ( seq M ( ( +g ` G ) , F ) ` N ) ) )
10		simpr 110	. . . . 5 |- ( ( ph /\ N < M ) -> N < M )
11	10	iftrued 3609	. . . 4 |- ( ( ph /\ N < M ) -> if ( N < M , .0. , ( seq M ( ( +g ` G ) , F ) ` N ) ) = .0. )
12	9, 11	eqtrd 2262	. . 3 |- ( ( ph /\ N < M ) -> ( G gsumg F ) = .0. )
13	1, 2	mndidcl 13449	. . . . 5 |- ( G e. Mnd -> .0. e. B )
14	4, 13	syl 14	. . . 4 |- ( ph -> .0. e. B )
15	14	adantr 276	. . 3 |- ( ( ph /\ N < M ) -> .0. e. B )
16	12, 15	eqeltrd 2306	. 2 |- ( ( ph /\ N < M ) -> ( G gsumg F ) e. B )
17	8	adantr 276	. . . 4 |- ( ( ph /\ -. N < M ) -> ( G gsumg F ) = if ( N < M , .0. , ( seq M ( ( +g ` G ) , F ) ` N ) ) )
18		simpr 110	. . . . 5 |- ( ( ph /\ -. N < M ) -> -. N < M )
19	18	iffalsed 3612	. . . 4 |- ( ( ph /\ -. N < M ) -> if ( N < M , .0. , ( seq M ( ( +g ` G ) , F ) ` N ) ) = ( seq M ( ( +g ` G ) , F ) ` N ) )
20	17, 19	eqtrd 2262	. . 3 |- ( ( ph /\ -. N < M ) -> ( G gsumg F ) = ( seq M ( ( +g ` G ) , F ) ` N ) )
21	5	adantr 276	. . . . 5 |- ( ( ph /\ -. N < M ) -> M e. ZZ )
22	6	adantr 276	. . . . 5 |- ( ( ph /\ -. N < M ) -> N e. ZZ )
23	21	zred 9557	. . . . . 6 |- ( ( ph /\ -. N < M ) -> M e. RR )
24	22	zred 9557	. . . . . 6 |- ( ( ph /\ -. N < M ) -> N e. RR )
25	23, 24, 18	nltled 8255	. . . . 5 |- ( ( ph /\ -. N < M ) -> M <_ N )
26		eluz2 9716	. . . . 5 |- ( N e. ( ZZ>= ` M ) <-> ( M e. ZZ /\ N e. ZZ /\ M <_ N ) )
27	21, 22, 25, 26	syl3anbrc 1205	. . . 4 |- ( ( ph /\ -. N < M ) -> N e. ( ZZ>= ` M ) )
28	5, 6	fzfigd 10640	. . . . . . 7 |- ( ph -> ( M ... N ) e. Fin )
29	7, 28	fexd 5862	. . . . . 6 |- ( ph -> F e. _V )
30	29	ad2antrr 488	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ x e. ( ZZ>= ` M ) ) -> F e. _V )
31		vex 2802	. . . . 5 |- x e. _V
32		fvexg 5642	. . . . 5 |- ( ( F e. _V /\ x e. _V ) -> ( F ` x ) e. _V )
33	30, 31, 32	sylancl 413	. . . 4 |- ( ( ( ph /\ -. N < M ) /\ x e. ( ZZ>= ` M ) ) -> ( F ` x ) e. _V )
34	7	ad2antrr 488	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ x e. ( M ... N ) ) -> F : ( M ... N ) --> B )
35		simpr 110	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ x e. ( M ... N ) ) -> x e. ( M ... N ) )
36	34, 35	ffvelcdmd 5764	. . . 4 |- ( ( ( ph /\ -. N < M ) /\ x e. ( M ... N ) ) -> ( F ` x ) e. B )
37	4	ad2antrr 488	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ ( x e. B /\ y e. B ) ) -> G e. Mnd )
38		simprl 529	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ ( x e. B /\ y e. B ) ) -> x e. B )
39		simprr 531	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ ( x e. B /\ y e. B ) ) -> y e. B )
40	1, 3	mndcl 13442	. . . . 5 |- ( ( G e. Mnd /\ x e. B /\ y e. B ) -> ( x ( +g ` G ) y ) e. B )
41	37, 38, 39, 40	syl3anc 1271	. . . 4 |- ( ( ( ph /\ -. N < M ) /\ ( x e. B /\ y e. B ) ) -> ( x ( +g ` G ) y ) e. B )
42		ssv 3246	. . . . 5 |- B C_ _V
43	42	a1i 9	. . . 4 |- ( ( ph /\ -. N < M ) -> B C_ _V )
44		simprl 529	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ ( x e. _V /\ y e. _V ) ) -> x e. _V )
45		plusgslid 13131	. . . . . . . 8 |- ( +g = Slot ( +g ` ndx ) /\ ( +g ` ndx ) e. NN )
46	45	slotex 13045	. . . . . . 7 |- ( G e. Mnd -> ( +g ` G ) e. _V )
47	4, 46	syl 14	. . . . . 6 |- ( ph -> ( +g ` G ) e. _V )
48	47	ad2antrr 488	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ ( x e. _V /\ y e. _V ) ) -> ( +g ` G ) e. _V )
49		simprr 531	. . . . 5 |- ( ( ( ph /\ -. N < M ) /\ ( x e. _V /\ y e. _V ) ) -> y e. _V )
50		ovexg 6028	. . . . 5 |- ( ( x e. _V /\ ( +g ` G ) e. _V /\ y e. _V ) -> ( x ( +g ` G ) y ) e. _V )
51	44, 48, 49, 50	syl3anc 1271	. . . 4 |- ( ( ( ph /\ -. N < M ) /\ ( x e. _V /\ y e. _V ) ) -> ( x ( +g ` G ) y ) e. _V )
52	27, 33, 36, 41, 43, 51	seq3clss 10680	. . 3 |- ( ( ph /\ -. N < M ) -> ( seq M ( ( +g ` G ) , F ) ` N ) e. B )
53	20, 52	eqeltrd 2306	. 2 |- ( ( ph /\ -. N < M ) -> ( G gsumg F ) e. B )
54		zdclt 9512	. . . 4 |- ( ( N e. ZZ /\ M e. ZZ ) -> DECID N < M )
55	6, 5, 54	syl2anc 411	. . 3 |- ( ph -> DECID N < M )
56		exmiddc 841	. . 3 |- (DECID N < M -> ( N < M \/ -. N < M ) )
57	55, 56	syl 14	. 2 |- ( ph -> ( N < M \/ -. N < M ) )
58	16, 53, 57	mpjaodan 803	1 |- ( ph -> ( G gsumg F ) e. B )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   \/ wo 713  DECID wdc 839   = wceq 1395   e. wcel 2200   _Vcvv 2799   C_ wss 3197   ifcif 3602   class class class wbr 4082   -->wf 5310   ` cfv 5314  (class class class)co 5994   Fincfn 6877   < clt 8169   <_ cle 8170   ZZcz 9434   ZZ>=cuz 9710   ...cfz 10192   seqcseq 10656   Basecbs 13018   +g cplusg 13096   0gc0g 13275   gsum_g cgsu 13276   Mndcmnd 13435

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 4198  ax-sep 4201  ax-nul 4209  ax-pow 4257  ax-pr 4292  ax-un 4521  ax-setind 4626  ax-iinf 4677  ax-cnex 8078  ax-resscn 8079  ax-1cn 8080  ax-1re 8081  ax-icn 8082  ax-addcl 8083  ax-addrcl 8084  ax-mulcl 8085  ax-addcom 8087  ax-addass 8089  ax-distr 8091  ax-i2m1 8092  ax-0lt1 8093  ax-0id 8095  ax-rnegex 8096  ax-cnre 8098  ax-pre-ltirr 8099  ax-pre-ltwlin 8100  ax-pre-lttrn 8101  ax-pre-apti 8102  ax-pre-ltadd 8103

This theorem depends on definitions:  df-bi 117  df-dc 840  df-3or 1003  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-if 3603  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3888  df-int 3923  df-iun 3966  df-br 4083  df-opab 4145  df-mpt 4146  df-tr 4182  df-id 4381  df-iord 4454  df-on 4456  df-ilim 4457  df-suc 4459  df-iom 4680  df-xp 4722  df-rel 4723  df-cnv 4724  df-co 4725  df-dm 4726  df-rn 4727  df-res 4728  df-ima 4729  df-iota 5274  df-fun 5316  df-fn 5317  df-f 5318  df-f1 5319  df-fo 5320  df-f1o 5321  df-fv 5322  df-riota 5947  df-ov 5997  df-oprab 5998  df-mpo 5999  df-1st 6276  df-2nd 6277  df-recs 6441  df-frec 6527  df-1o 6552  df-er 6670  df-en 6878  df-fin 6880  df-pnf 8171  df-mnf 8172  df-xr 8173  df-ltxr 8174  df-le 8175  df-sub 8307  df-neg 8308  df-inn 9099  df-2 9157  df-n0 9358  df-z 9435  df-uz 9711  df-fz 10193  df-fzo 10327  df-seqfrec 10657  df-ndx 13021  df-slot 13022  df-base 13024  df-plusg 13109  df-0g 13277  df-igsum 13278  df-mgm 13375  df-sgrp 13421  df-mnd 13436

This theorem is referenced by:  gsumfzmhm2  13867  gsumfzfsumlemm  14536  lgseisenlem3  15736  lgseisenlem4  15737