Theorem iseqf1olemqval 10443

Description: Lemma for seq3f1o 10460. Value of the function Q. (Contributed by Jim Kingdon, 28-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 ) )
iseqf1olemqval.q	|- Q = ( u e. ( M ... N ) |-> if ( u e. ( K ... ( `' J ` K ) ) , if ( u = K , K , ( J ` ( u - 1 ) ) ) , ( J ` u ) ) )

Assertion

Ref	Expression
iseqf1olemqval	|- ( ph -> ( Q ` A ) = if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) )

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

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

Proof of Theorem iseqf1olemqval

Step	Hyp	Ref	Expression
1		iseqf1olemqcl.a	. 2 |- ( ph -> A e. ( M ... N ) )
2		iseqf1olemqcl.k	. . 3 |- ( ph -> K e. ( M ... N ) )
3		iseqf1olemqcl.j	. . 3 |- ( ph -> J : ( M ... N ) -1-1-onto-> ( M ... N ) )
4	2, 3, 1	iseqf1olemqcl 10442	. 2 |- ( ph -> if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) e. ( M ... N ) )
5		eleq1 2233	. . . 4 |- ( u = A -> ( u e. ( K ... ( `' J ` K ) ) <-> A e. ( K ... ( `' J ` K ) ) ) )
6		eqeq1 2177	. . . . 5 |- ( u = A -> ( u = K <-> A = K ) )
7		oveq1 5860	. . . . . 6 |- ( u = A -> ( u - 1 ) = ( A - 1 ) )
8	7	fveq2d 5500	. . . . 5 |- ( u = A -> ( J ` ( u - 1 ) ) = ( J ` ( A - 1 ) ) )
9	6, 8	ifbieq2d 3550	. . . 4 |- ( u = A -> if ( u = K , K , ( J ` ( u - 1 ) ) ) = if ( A = K , K , ( J ` ( A - 1 ) ) ) )
10		fveq2 5496	. . . 4 |- ( u = A -> ( J ` u ) = ( J ` A ) )
11	5, 9, 10	ifbieq12d 3552	. . 3 |- ( u = A -> if ( u e. ( K ... ( `' J ` K ) ) , if ( u = K , K , ( J ` ( u - 1 ) ) ) , ( J ` u ) ) = if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) )
12		iseqf1olemqval.q	. . 3 |- Q = ( u e. ( M ... N ) |-> if ( u e. ( K ... ( `' J ` K ) ) , if ( u = K , K , ( J ` ( u - 1 ) ) ) , ( J ` u ) ) )
13	11, 12	fvmptg 5572	. 2 |- ( ( A e. ( M ... N ) /\ if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) e. ( M ... N ) ) -> ( Q ` A ) = if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) )
14	1, 4, 13	syl2anc 409	1 |- ( ph -> ( Q ` A ) = if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) )

Syntax hints:   -> wi 4   = wceq 1348   e. wcel 2141   ifcif 3526   |-> cmpt 4050   `'ccnv 4610   -1-1-onto->wf1o 5197   ` cfv 5198  (class class class)co 5853   1c1 7775   - cmin 8090   ...cfz 9965

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-addcom 7874  ax-addass 7876  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-0id 7882  ax-rnegex 7883  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-ltwlin 7887  ax-pre-lttrn 7888  ax-pre-ltadd 7890

This theorem depends on definitions:  df-bi 116  df-dc 830  df-3or 974  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-if 3527  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-int 3832  df-br 3990  df-opab 4051  df-mpt 4052  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-rn 4622  df-res 4623  df-ima 4624  df-iota 5160  df-fun 5200  df-fn 5201  df-f 5202  df-f1 5203  df-fo 5204  df-f1o 5205  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-xr 7958  df-ltxr 7959  df-le 7960  df-sub 8092  df-neg 8093  df-inn 8879  df-n0 9136  df-z 9213  df-uz 9488  df-fz 9966

This theorem is referenced by:  iseqf1olemnab  10444  iseqf1olemab  10445  iseqf1olemnanb  10446  iseqf1olemqk  10450  seq3f1olemqsumkj  10454  seq3f1olemqsumk  10455