Theorem 2lgslem1b 15733

Description: Lemma 2 for 2lgslem1 15735. (Contributed by AV, 18-Jun-2021.)

Hypotheses

Ref	Expression
2lgslem1b.i	|- I = ( A ... B )
2lgslem1b.f	|- F = ( j e. I |-> ( j x. 2 ) )

Assertion

Ref	Expression
2lgslem1b	|- F : I -1-1-onto-> { x e. ZZ | E. i e. I x = ( i x. 2 ) }

Distinct variable group:   i, I, j, x

Allowed substitution hints:   A( x, i, j)   B( x, i, j)   F( x, i, j)

Proof of Theorem 2lgslem1b

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

Step	Hyp	Ref	Expression
1		2lgslem1b.f	. . . 4 |- F = ( j e. I |-> ( j x. 2 ) )
2		eqeq1 2216	. . . . . 6 |- ( x = ( j x. 2 ) -> ( x = ( i x. 2 ) <-> ( j x. 2 ) = ( i x. 2 ) ) )
3	2	rexbidv 2511	. . . . 5 |- ( x = ( j x. 2 ) -> ( E. i e. I x = ( i x. 2 ) <-> E. i e. I ( j x. 2 ) = ( i x. 2 ) ) )
4		elfzelz 10189	. . . . . . 7 |- ( j e. ( A ... B ) -> j e. ZZ )
5		2lgslem1b.i	. . . . . . 7 |- I = ( A ... B )
6	4, 5	eleq2s 2304	. . . . . 6 |- ( j e. I -> j e. ZZ )
7		2z 9442	. . . . . . 7 |- 2 e. ZZ
8	7	a1i 9	. . . . . 6 |- ( j e. I -> 2 e. ZZ )
9	6, 8	zmulcld 9543	. . . . 5 |- ( j e. I -> ( j x. 2 ) e. ZZ )
10		id 19	. . . . . 6 |- ( j e. I -> j e. I )
11		oveq1 5981	. . . . . . . 8 |- ( i = j -> ( i x. 2 ) = ( j x. 2 ) )
12	11	eqeq2d 2221	. . . . . . 7 |- ( i = j -> ( ( j x. 2 ) = ( i x. 2 ) <-> ( j x. 2 ) = ( j x. 2 ) ) )
13	12	adantl 277	. . . . . 6 |- ( ( j e. I /\ i = j ) -> ( ( j x. 2 ) = ( i x. 2 ) <-> ( j x. 2 ) = ( j x. 2 ) ) )
14		eqidd 2210	. . . . . 6 |- ( j e. I -> ( j x. 2 ) = ( j x. 2 ) )
15	10, 13, 14	rspcedvd 2893	. . . . 5 |- ( j e. I -> E. i e. I ( j x. 2 ) = ( i x. 2 ) )
16	3, 9, 15	elrabd 2941	. . . 4 |- ( j e. I -> ( j x. 2 ) e. { x e. ZZ | E. i e. I x = ( i x. 2 ) } )
17	1, 16	fmpti 5760	. . 3 |- F : I --> { x e. ZZ | E. i e. I x = ( i x. 2 ) }
18		oveq1 5981	. . . . . . 7 |- ( j = y -> ( j x. 2 ) = ( y x. 2 ) )
19		simpl 109	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> y e. I )
20		elfzelz 10189	. . . . . . . . . 10 |- ( y e. ( A ... B ) -> y e. ZZ )
21	20, 5	eleq2s 2304	. . . . . . . . 9 |- ( y e. I -> y e. ZZ )
22		id 19	. . . . . . . . . 10 |- ( y e. ZZ -> y e. ZZ )
23	7	a1i 9	. . . . . . . . . 10 |- ( y e. ZZ -> 2 e. ZZ )
24	22, 23	zmulcld 9543	. . . . . . . . 9 |- ( y e. ZZ -> ( y x. 2 ) e. ZZ )
25	21, 24	syl 14	. . . . . . . 8 |- ( y e. I -> ( y x. 2 ) e. ZZ )
26	25	adantr 276	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> ( y x. 2 ) e. ZZ )
27	1, 18, 19, 26	fvmptd3 5701	. . . . . 6 |- ( ( y e. I /\ z e. I ) -> ( F ` y ) = ( y x. 2 ) )
28		oveq1 5981	. . . . . . 7 |- ( j = z -> ( j x. 2 ) = ( z x. 2 ) )
29		simpr 110	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> z e. I )
30		elfzelz 10189	. . . . . . . . . 10 |- ( z e. ( A ... B ) -> z e. ZZ )
31	30, 5	eleq2s 2304	. . . . . . . . 9 |- ( z e. I -> z e. ZZ )
32	7	a1i 9	. . . . . . . . 9 |- ( z e. I -> 2 e. ZZ )
33	31, 32	zmulcld 9543	. . . . . . . 8 |- ( z e. I -> ( z x. 2 ) e. ZZ )
34	33	adantl 277	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> ( z x. 2 ) e. ZZ )
35	1, 28, 29, 34	fvmptd3 5701	. . . . . 6 |- ( ( y e. I /\ z e. I ) -> ( F ` z ) = ( z x. 2 ) )
36	27, 35	eqeq12d 2224	. . . . 5 |- ( ( y e. I /\ z e. I ) -> ( ( F ` y ) = ( F ` z ) <-> ( y x. 2 ) = ( z x. 2 ) ) )
37	21	zcnd 9538	. . . . . . . 8 |- ( y e. I -> y e. CC )
38	37	adantr 276	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> y e. CC )
39	31	zcnd 9538	. . . . . . . 8 |- ( z e. I -> z e. CC )
40	39	adantl 277	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> z e. CC )
41		2cnd 9151	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> 2 e. CC )
42		2ap0 9171	. . . . . . . 8 |- 2 # 0
43	42	a1i 9	. . . . . . 7 |- ( ( y e. I /\ z e. I ) -> 2 # 0 )
44	38, 40, 41, 43	mulcanap2d 8777	. . . . . 6 |- ( ( y e. I /\ z e. I ) -> ( ( y x. 2 ) = ( z x. 2 ) <-> y = z ) )
45	44	biimpd 144	. . . . 5 |- ( ( y e. I /\ z e. I ) -> ( ( y x. 2 ) = ( z x. 2 ) -> y = z ) )
46	36, 45	sylbid 150	. . . 4 |- ( ( y e. I /\ z e. I ) -> ( ( F ` y ) = ( F ` z ) -> y = z ) )
47	46	rgen2 2596	. . 3 |- A. y e. I A. z e. I ( ( F ` y ) = ( F ` z ) -> y = z )
48		dff13 5865	. . 3 |- ( F : I -1-1-> { x e. ZZ | E. i e. I x = ( i x. 2 ) } <-> ( F : I --> { x e. ZZ | E. i e. I x = ( i x. 2 ) } /\ A. y e. I A. z e. I ( ( F ` y ) = ( F ` z ) -> y = z ) ) )
49	17, 47, 48	mpbir2an 947	. 2 |- F : I -1-1-> { x e. ZZ | E. i e. I x = ( i x. 2 ) }
50		oveq1 5981	. . . . . . 7 |- ( j = i -> ( j x. 2 ) = ( i x. 2 ) )
51	50	eqeq2d 2221	. . . . . 6 |- ( j = i -> ( x = ( j x. 2 ) <-> x = ( i x. 2 ) ) )
52	51	cbvrexvw 2750	. . . . 5 |- ( E. j e. I x = ( j x. 2 ) <-> E. i e. I x = ( i x. 2 ) )
53		elfzelz 10189	. . . . . . . . . 10 |- ( i e. ( A ... B ) -> i e. ZZ )
54	7	a1i 9	. . . . . . . . . 10 |- ( i e. ( A ... B ) -> 2 e. ZZ )
55	53, 54	zmulcld 9543	. . . . . . . . 9 |- ( i e. ( A ... B ) -> ( i x. 2 ) e. ZZ )
56	55, 5	eleq2s 2304	. . . . . . . 8 |- ( i e. I -> ( i x. 2 ) e. ZZ )
57		eleq1 2272	. . . . . . . 8 |- ( x = ( i x. 2 ) -> ( x e. ZZ <-> ( i x. 2 ) e. ZZ ) )
58	56, 57	syl5ibrcom 157	. . . . . . 7 |- ( i e. I -> ( x = ( i x. 2 ) -> x e. ZZ ) )
59	58	rexlimiv 2622	. . . . . 6 |- ( E. i e. I x = ( i x. 2 ) -> x e. ZZ )
60	59	pm4.71ri 392	. . . . 5 |- ( E. i e. I x = ( i x. 2 ) <-> ( x e. ZZ /\ E. i e. I x = ( i x. 2 ) ) )
61	52, 60	bitri 184	. . . 4 |- ( E. j e. I x = ( j x. 2 ) <-> ( x e. ZZ /\ E. i e. I x = ( i x. 2 ) ) )
62	61	abbii 2325	. . 3 |- { x | E. j e. I x = ( j x. 2 ) } = { x | ( x e. ZZ /\ E. i e. I x = ( i x. 2 ) ) }
63	1	rnmpt 4948	. . 3 |- ran F = { x | E. j e. I x = ( j x. 2 ) }
64		df-rab 2497	. . 3 |- { x e. ZZ | E. i e. I x = ( i x. 2 ) } = { x | ( x e. ZZ /\ E. i e. I x = ( i x. 2 ) ) }
65	62, 63, 64	3eqtr4i 2240	. 2 |- ran F = { x e. ZZ | E. i e. I x = ( i x. 2 ) }
66		dff1o5 5557	. 2 |- ( F : I -1-1-onto-> { x e. ZZ | E. i e. I x = ( i x. 2 ) } <-> ( F : I -1-1-> { x e. ZZ | E. i e. I x = ( i x. 2 ) } /\ ran F = { x e. ZZ | E. i e. I x = ( i x. 2 ) } ) )
67	49, 65, 66	mpbir2an 947	1 |- F : I -1-1-onto-> { x e. ZZ | E. i e. I x = ( i x. 2 ) }

Syntax hints:   -> wi 4   /\ wa 104   <-> wb 105   = wceq 1375   e. wcel 2180   {cab 2195   A.wral 2488   E.wrex 2489   {crab 2492   class class class wbr 4062   |-> cmpt 4124   ran crn 4697   -->wf 5290   -1-1->wf1 5291   -1-1-onto->wf1o 5293   ` cfv 5294  (class class class)co 5974   CCcc 7965   0cc0 7967   x. cmul 7972   # cap 8696   2c2 9129   ZZcz 9414   ...cfz 10172

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 713  ax-5 1473  ax-7 1474  ax-gen 1475  ax-ie1 1519  ax-ie2 1520  ax-8 1530  ax-10 1531  ax-11 1532  ax-i12 1533  ax-bndl 1535  ax-4 1536  ax-17 1552  ax-i9 1556  ax-ial 1560  ax-i5r 1561  ax-13 2182  ax-14 2183  ax-ext 2191  ax-sep 4181  ax-pow 4237  ax-pr 4272  ax-un 4501  ax-setind 4606  ax-cnex 8058  ax-resscn 8059  ax-1cn 8060  ax-1re 8061  ax-icn 8062  ax-addcl 8063  ax-addrcl 8064  ax-mulcl 8065  ax-mulrcl 8066  ax-addcom 8067  ax-mulcom 8068  ax-addass 8069  ax-mulass 8070  ax-distr 8071  ax-i2m1 8072  ax-0lt1 8073  ax-1rid 8074  ax-0id 8075  ax-rnegex 8076  ax-precex 8077  ax-cnre 8078  ax-pre-ltirr 8079  ax-pre-ltwlin 8080  ax-pre-lttrn 8081  ax-pre-apti 8082  ax-pre-ltadd 8083  ax-pre-mulgt0 8084  ax-pre-mulext 8085

This theorem depends on definitions:  df-bi 117  df-3or 984  df-3an 985  df-tru 1378  df-fal 1381  df-nf 1487  df-sb 1789  df-eu 2060  df-mo 2061  df-clab 2196  df-cleq 2202  df-clel 2205  df-nfc 2341  df-ne 2381  df-nel 2476  df-ral 2493  df-rex 2494  df-reu 2495  df-rab 2497  df-v 2781  df-sbc 3009  df-csb 3105  df-dif 3179  df-un 3181  df-in 3183  df-ss 3190  df-pw 3631  df-sn 3652  df-pr 3653  df-op 3655  df-uni 3868  df-int 3903  df-br 4063  df-opab 4125  df-mpt 4126  df-id 4361  df-po 4364  df-iso 4365  df-xp 4702  df-rel 4703  df-cnv 4704  df-co 4705  df-dm 4706  df-rn 4707  df-res 4708  df-ima 4709  df-iota 5254  df-fun 5296  df-fn 5297  df-f 5298  df-f1 5299  df-fo 5300  df-f1o 5301  df-fv 5302  df-riota 5927  df-ov 5977  df-oprab 5978  df-mpo 5979  df-pnf 8151  df-mnf 8152  df-xr 8153  df-ltxr 8154  df-le 8155  df-sub 8287  df-neg 8288  df-reap 8690  df-ap 8697  df-inn 9079  df-2 9137  df-n0 9338  df-z 9415  df-uz 9691  df-fz 10173

This theorem is referenced by:  2lgslem1  15735