Theorem nninfwlporlemd 7231

Description: Given two countably infinite sequences of zeroes and ones, they are equal if and only if a sequence formed by pointwise comparing them is all ones. (Contributed by Jim Kingdon, 6-Dec-2024.)

Hypotheses

Ref	Expression
nninfwlporlem.x	|- ( ph -> X : om --> 2o )
nninfwlporlem.y	|- ( ph -> Y : om --> 2o )
nninfwlporlem.d	|- D = ( i e. om |-> if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) )

Assertion

Ref	Expression
nninfwlporlemd	|- ( ph -> ( X = Y <-> D = ( i e. om |-> 1o ) ) )

Distinct variable groups:   D, i   i, X   i, Y   ph, i

Proof of Theorem nninfwlporlemd

Dummy variable j is distinct from all other variables.

Step	Hyp	Ref	Expression
1		1n0 6485	. . . . . . . . 9 |- 1o =/= (/)
2	1	neii 2366	. . . . . . . 8 |- -. 1o = (/)
3	2	intnan 930	. . . . . . 7 |- -. ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) )
4	3	biorfi 747	. . . . . 6 |- ( ( X ` i ) = ( Y ` i ) <-> ( ( X ` i ) = ( Y ` i ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) )
5		eqid 2193	. . . . . . . 8 |- 1o = 1o
6	5	biantru 302	. . . . . . 7 |- ( ( X ` i ) = ( Y ` i ) <-> ( ( X ` i ) = ( Y ` i ) /\ 1o = 1o ) )
7	6	orbi1i 764	. . . . . 6 |- ( ( ( X ` i ) = ( Y ` i ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) <-> ( ( ( X ` i ) = ( Y ` i ) /\ 1o = 1o ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) )
8	4, 7	bitri 184	. . . . 5 |- ( ( X ` i ) = ( Y ` i ) <-> ( ( ( X ` i ) = ( Y ` i ) /\ 1o = 1o ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) )
9		eqcom 2195	. . . . . 6 |- ( 1o = ( D ` i ) <-> ( D ` i ) = 1o )
10		nninfwlporlem.d	. . . . . . . . . 10 |- D = ( i e. om |-> if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) )
11		fveq2 5554	. . . . . . . . . . . . 13 |- ( i = j -> ( X ` i ) = ( X ` j ) )
12		fveq2 5554	. . . . . . . . . . . . 13 |- ( i = j -> ( Y ` i ) = ( Y ` j ) )
13	11, 12	eqeq12d 2208	. . . . . . . . . . . 12 |- ( i = j -> ( ( X ` i ) = ( Y ` i ) <-> ( X ` j ) = ( Y ` j ) ) )
14	13	ifbid 3578	. . . . . . . . . . 11 |- ( i = j -> if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) = if ( ( X ` j ) = ( Y ` j ) , 1o , (/) ) )
15	14	cbvmptv 4125	. . . . . . . . . 10 |- ( i e. om |-> if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) ) = ( j e. om |-> if ( ( X ` j ) = ( Y ` j ) , 1o , (/) ) )
16	10, 15	eqtri 2214	. . . . . . . . 9 |- D = ( j e. om |-> if ( ( X ` j ) = ( Y ` j ) , 1o , (/) ) )
17		fveq2 5554	. . . . . . . . . . 11 |- ( j = i -> ( X ` j ) = ( X ` i ) )
18		fveq2 5554	. . . . . . . . . . 11 |- ( j = i -> ( Y ` j ) = ( Y ` i ) )
19	17, 18	eqeq12d 2208	. . . . . . . . . 10 |- ( j = i -> ( ( X ` j ) = ( Y ` j ) <-> ( X ` i ) = ( Y ` i ) ) )
20	19	ifbid 3578	. . . . . . . . 9 |- ( j = i -> if ( ( X ` j ) = ( Y ` j ) , 1o , (/) ) = if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) )
21		simpr 110	. . . . . . . . 9 |- ( ( ph /\ i e. om ) -> i e. om )
22		1lt2o 6495	. . . . . . . . . . 11 |- 1o e. 2o
23	22	a1i 9	. . . . . . . . . 10 |- ( ( ph /\ i e. om ) -> 1o e. 2o )
24		0lt2o 6494	. . . . . . . . . . 11 |- (/) e. 2o
25	24	a1i 9	. . . . . . . . . 10 |- ( ( ph /\ i e. om ) -> (/) e. 2o )
26		2ssom 6577	. . . . . . . . . . . 12 |- 2o C_ om
27		nninfwlporlem.x	. . . . . . . . . . . . 13 |- ( ph -> X : om --> 2o )
28	27	ffvelcdmda 5693	. . . . . . . . . . . 12 |- ( ( ph /\ i e. om ) -> ( X ` i ) e. 2o )
29	26, 28	sselid 3177	. . . . . . . . . . 11 |- ( ( ph /\ i e. om ) -> ( X ` i ) e. om )
30		nninfwlporlem.y	. . . . . . . . . . . . 13 |- ( ph -> Y : om --> 2o )
31	30	ffvelcdmda 5693	. . . . . . . . . . . 12 |- ( ( ph /\ i e. om ) -> ( Y ` i ) e. 2o )
32	26, 31	sselid 3177	. . . . . . . . . . 11 |- ( ( ph /\ i e. om ) -> ( Y ` i ) e. om )
33		nndceq 6552	. . . . . . . . . . 11 |- ( ( ( X ` i ) e. om /\ ( Y ` i ) e. om ) -> DECID ( X ` i ) = ( Y ` i ) )
34	29, 32, 33	syl2anc 411	. . . . . . . . . 10 |- ( ( ph /\ i e. om ) -> DECID ( X ` i ) = ( Y ` i ) )
35	23, 25, 34	ifcldcd 3593	. . . . . . . . 9 |- ( ( ph /\ i e. om ) -> if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) e. 2o )
36	16, 20, 21, 35	fvmptd3 5651	. . . . . . . 8 |- ( ( ph /\ i e. om ) -> ( D ` i ) = if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) )
37	36	eqeq2d 2205	. . . . . . 7 |- ( ( ph /\ i e. om ) -> ( 1o = ( D ` i ) <-> 1o = if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) ) )
38		eqifdc 3592	. . . . . . . 8 |- (DECID ( X ` i ) = ( Y ` i ) -> ( 1o = if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) <-> ( ( ( X ` i ) = ( Y ` i ) /\ 1o = 1o ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) ) )
39	34, 38	syl 14	. . . . . . 7 |- ( ( ph /\ i e. om ) -> ( 1o = if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) <-> ( ( ( X ` i ) = ( Y ` i ) /\ 1o = 1o ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) ) )
40	37, 39	bitrd 188	. . . . . 6 |- ( ( ph /\ i e. om ) -> ( 1o = ( D ` i ) <-> ( ( ( X ` i ) = ( Y ` i ) /\ 1o = 1o ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) ) )
41	9, 40	bitr3id 194	. . . . 5 |- ( ( ph /\ i e. om ) -> ( ( D ` i ) = 1o <-> ( ( ( X ` i ) = ( Y ` i ) /\ 1o = 1o ) \/ ( -. ( X ` i ) = ( Y ` i ) /\ 1o = (/) ) ) ) )
42	8, 41	bitr4id 199	. . . 4 |- ( ( ph /\ i e. om ) -> ( ( X ` i ) = ( Y ` i ) <-> ( D ` i ) = 1o ) )
43	42	ralbidva 2490	. . 3 |- ( ph -> ( A. i e. om ( X ` i ) = ( Y ` i ) <-> A. i e. om ( D ` i ) = 1o ) )
44		fveqeq2 5563	. . . 4 |- ( i = j -> ( ( D ` i ) = 1o <-> ( D ` j ) = 1o ) )
45	44	cbvralv 2726	. . 3 |- ( A. i e. om ( D ` i ) = 1o <-> A. j e. om ( D ` j ) = 1o )
46	43, 45	bitrdi 196	. 2 |- ( ph -> ( A. i e. om ( X ` i ) = ( Y ` i ) <-> A. j e. om ( D ` j ) = 1o ) )
47	27	ffnd 5404	. . 3 |- ( ph -> X Fn om )
48	30	ffnd 5404	. . 3 |- ( ph -> Y Fn om )
49		eqfnfv 5655	. . 3 |- ( ( X Fn om /\ Y Fn om ) -> ( X = Y <-> A. i e. om ( X ` i ) = ( Y ` i ) ) )
50	47, 48, 49	syl2anc 411	. 2 |- ( ph -> ( X = Y <-> A. i e. om ( X ` i ) = ( Y ` i ) ) )
51	35	ralrimiva 2567	. . . 4 |- ( ph -> A. i e. om if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) e. 2o )
52	10	fnmpt 5380	. . . 4 |- ( A. i e. om if ( ( X ` i ) = ( Y ` i ) , 1o , (/) ) e. 2o -> D Fn om )
53	51, 52	syl 14	. . 3 |- ( ph -> D Fn om )
54		eqidd 2194	. . 3 |- ( j = i -> 1o = 1o )
55		1onn 6573	. . . 4 |- 1o e. om
56	55	a1i 9	. . 3 |- ( ( ph /\ j e. om ) -> 1o e. om )
57	55	a1i 9	. . 3 |- ( ( ph /\ i e. om ) -> 1o e. om )
58	53, 54, 56, 57	fnmptfvd 5662	. 2 |- ( ph -> ( D = ( i e. om |-> 1o ) <-> A. j e. om ( D ` j ) = 1o ) )
59	46, 50, 58	3bitr4d 220	1 |- ( ph -> ( X = Y <-> D = ( i e. om |-> 1o ) ) )

Syntax hints:   -. wn 3   -> wi 4   /\ wa 104   <-> wb 105   \/ wo 709  DECID wdc 835   = wceq 1364   e. wcel 2164   A.wral 2472   (/)c0 3446   ifcif 3557   |-> cmpt 4090   omcom 4622   Fn wfn 5249   -->wf 5250   ` cfv 5254   1oc1o 6462   2oc2o 6463

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 615  ax-in2 616  ax-io 710  ax-5 1458  ax-7 1459  ax-gen 1460  ax-ie1 1504  ax-ie2 1505  ax-8 1515  ax-10 1516  ax-11 1517  ax-i12 1518  ax-bndl 1520  ax-4 1521  ax-17 1537  ax-i9 1541  ax-ial 1545  ax-i5r 1546  ax-13 2166  ax-14 2167  ax-ext 2175  ax-sep 4147  ax-nul 4155  ax-pow 4203  ax-pr 4238  ax-un 4464  ax-setind 4569  ax-iinf 4620

This theorem depends on definitions:  df-bi 117  df-dc 836  df-3or 981  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-eu 2045  df-mo 2046  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ne 2365  df-ral 2477  df-rex 2478  df-v 2762  df-sbc 2986  df-csb 3081  df-dif 3155  df-un 3157  df-in 3159  df-ss 3166  df-nul 3447  df-if 3558  df-pw 3603  df-sn 3624  df-pr 3625  df-op 3627  df-uni 3836  df-int 3871  df-br 4030  df-opab 4091  df-mpt 4092  df-tr 4128  df-id 4324  df-iord 4397  df-on 4399  df-suc 4402  df-iom 4623  df-xp 4665  df-rel 4666  df-cnv 4667  df-co 4668  df-dm 4669  df-rn 4670  df-iota 5215  df-fun 5256  df-fn 5257  df-f 5258  df-fv 5262  df-1o 6469  df-2o 6470

This theorem is referenced by:  nninfwlporlem  7232