Theorem iseqf1olemnanb 9973

Description: Lemma for seq3f1o 9987. (Contributed by Jim Kingdon, 27-Aug-2022.)

Hypotheses

Ref	Expression
iseqf1olemqcl.k	|- ( ph -> K e. ( M ... N ) )
iseqf1olemqcl.j	|- ( ph -> J : ( M ... N ) -1-1-onto-> ( M ... N ) )
iseqf1olemqcl.a	|- ( ph -> A e. ( M ... N ) )
iseqf1olemnab.b	|- ( ph -> B e. ( M ... N ) )
iseqf1olemnab.eq	|- ( ph -> ( Q ` A ) = ( Q ` B ) )
iseqf1olemnab.q	|- Q = ( u e. ( M ... N ) |-> if ( u e. ( K ... ( `' J ` K ) ) , if ( u = K , K , ( J ` ( u - 1 ) ) ) , ( J ` u ) ) )
iseqf1olemnanb.a	|- ( ph -> -. A e. ( K ... ( `' J ` K ) ) )
iseqf1olemnanb.b	|- ( ph -> -. B e. ( K ... ( `' J ` K ) ) )

Assertion

Ref	Expression
iseqf1olemnanb	|- ( ph -> A = B )

Distinct variable groups:   u, A   u, B   u, J   u, K   u, M   u, N

Allowed substitution hints:   ph( u)   Q( u)

Proof of Theorem iseqf1olemnanb

Step	Hyp	Ref	Expression
1		iseqf1olemnab.eq	. . 3 |- ( ph -> ( Q ` A ) = ( Q ` B ) )
2		iseqf1olemqcl.k	. . . . 5 |- ( ph -> K e. ( M ... N ) )
3		iseqf1olemqcl.j	. . . . 5 |- ( ph -> J : ( M ... N ) -1-1-onto-> ( M ... N ) )
4		iseqf1olemqcl.a	. . . . 5 |- ( ph -> A e. ( M ... N ) )
5		iseqf1olemnab.q	. . . . 5 |- Q = ( u e. ( M ... N ) |-> if ( u e. ( K ... ( `' J ` K ) ) , if ( u = K , K , ( J ` ( u - 1 ) ) ) , ( J ` u ) ) )
6	2, 3, 4, 5	iseqf1olemqval 9970	. . . 4 |- ( ph -> ( Q ` A ) = if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) )
7		iseqf1olemnanb.a	. . . . 5 |- ( ph -> -. A e. ( K ... ( `' J ` K ) ) )
8	7	iffalsed 3407	. . . 4 |- ( ph -> if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) = ( J ` A ) )
9	6, 8	eqtrd 2121	. . 3 |- ( ph -> ( Q ` A ) = ( J ` A ) )
10		iseqf1olemnab.b	. . . . 5 |- ( ph -> B e. ( M ... N ) )
11	2, 3, 10, 5	iseqf1olemqval 9970	. . . 4 |- ( ph -> ( Q ` B ) = if ( B e. ( K ... ( `' J ` K ) ) , if ( B = K , K , ( J ` ( B - 1 ) ) ) , ( J ` B ) ) )
12		iseqf1olemnanb.b	. . . . 5 |- ( ph -> -. B e. ( K ... ( `' J ` K ) ) )
13	12	iffalsed 3407	. . . 4 |- ( ph -> if ( B e. ( K ... ( `' J ` K ) ) , if ( B = K , K , ( J ` ( B - 1 ) ) ) , ( J ` B ) ) = ( J ` B ) )
14	11, 13	eqtrd 2121	. . 3 |- ( ph -> ( Q ` B ) = ( J ` B ) )
15	1, 9, 14	3eqtr3d 2129	. 2 |- ( ph -> ( J ` A ) = ( J ` B ) )
16		f1of1 5265	. . . 4 |- ( J : ( M ... N ) -1-1-onto-> ( M ... N ) -> J : ( M ... N ) -1-1-> ( M ... N ) )
17	3, 16	syl 14	. . 3 |- ( ph -> J : ( M ... N ) -1-1-> ( M ... N ) )
18		f1veqaeq 5562	. . 3 |- ( ( J : ( M ... N ) -1-1-> ( M ... N ) /\ ( A e. ( M ... N ) /\ B e. ( M ... N ) ) ) -> ( ( J ` A ) = ( J ` B ) -> A = B ) )
19	17, 4, 10, 18	syl12anc 1173	. 2 |- ( ph -> ( ( J ` A ) = ( J ` B ) -> A = B ) )
20	15, 19	mpd 13	1 |- ( ph -> A = B )

Syntax hints:   -. wn 3   -> wi 4   = wceq 1290   e. wcel 1439   ifcif 3397   |-> cmpt 3905   `'ccnv 4450   -1-1->wf1 5025   -1-1-onto->wf1o 5027   ` cfv 5028  (class class class)co 5666   1c1 7405   - cmin 7707   ...cfz 9478

This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-mp 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 580  ax-in2 581  ax-io 666  ax-5 1382  ax-7 1383  ax-gen 1384  ax-ie1 1428  ax-ie2 1429  ax-8 1441  ax-10 1442  ax-11 1443  ax-i12 1444  ax-bndl 1445  ax-4 1446  ax-13 1450  ax-14 1451  ax-17 1465  ax-i9 1469  ax-ial 1473  ax-i5r 1474  ax-ext 2071  ax-sep 3963  ax-pow 4015  ax-pr 4045  ax-un 4269  ax-setind 4366  ax-cnex 7490  ax-resscn 7491  ax-1cn 7492  ax-1re 7493  ax-icn 7494  ax-addcl 7495  ax-addrcl 7496  ax-mulcl 7497  ax-addcom 7499  ax-addass 7501  ax-distr 7503  ax-i2m1 7504  ax-0lt1 7505  ax-0id 7507  ax-rnegex 7508  ax-cnre 7510  ax-pre-ltirr 7511  ax-pre-ltwlin 7512  ax-pre-lttrn 7513  ax-pre-ltadd 7515

This theorem depends on definitions:  df-bi 116  df-dc 782  df-3or 926  df-3an 927  df-tru 1293  df-fal 1296  df-nf 1396  df-sb 1694  df-eu 1952  df-mo 1953  df-clab 2076  df-cleq 2082  df-clel 2085  df-nfc 2218  df-ne 2257  df-nel 2352  df-ral 2365  df-rex 2366  df-reu 2367  df-rab 2369  df-v 2622  df-sbc 2842  df-dif 3002  df-un 3004  df-in 3006  df-ss 3013  df-if 3398  df-pw 3435  df-sn 3456  df-pr 3457  df-op 3459  df-uni 3660  df-int 3695  df-br 3852  df-opab 3906  df-mpt 3907  df-id 4129  df-xp 4457  df-rel 4458  df-cnv 4459  df-co 4460  df-dm 4461  df-rn 4462  df-res 4463  df-ima 4464  df-iota 4993  df-fun 5030  df-fn 5031  df-f 5032  df-f1 5033  df-fo 5034  df-f1o 5035  df-fv 5036  df-riota 5622  df-ov 5669  df-oprab 5670  df-mpt2 5671  df-pnf 7578  df-mnf 7579  df-xr 7580  df-ltxr 7581  df-le 7582  df-sub 7709  df-neg 7710  df-inn 8477  df-n0 8728  df-z 8805  df-uz 9074  df-fz 9479

This theorem is referenced by:  iseqf1olemmo  9975