Theorem iseqf1olemqval 10722

Description: Lemma for seq3f1o 10739. 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 10721	. 2 |- ( ph -> if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) e. ( M ... N ) )
5		eleq1 2292	. . . 4 |- ( u = A -> ( u e. ( K ... ( `' J ` K ) ) <-> A e. ( K ... ( `' J ` K ) ) ) )
6		eqeq1 2236	. . . . 5 |- ( u = A -> ( u = K <-> A = K ) )
7		oveq1 6008	. . . . . 6 |- ( u = A -> ( u - 1 ) = ( A - 1 ) )
8	7	fveq2d 5631	. . . . 5 |- ( u = A -> ( J ` ( u - 1 ) ) = ( J ` ( A - 1 ) ) )
9	6, 8	ifbieq2d 3627	. . . 4 |- ( u = A -> if ( u = K , K , ( J ` ( u - 1 ) ) ) = if ( A = K , K , ( J ` ( A - 1 ) ) ) )
10		fveq2 5627	. . . 4 |- ( u = A -> ( J ` u ) = ( J ` A ) )
11	5, 9, 10	ifbieq12d 3629	. . 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 5710	. 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 411	1 |- ( ph -> ( Q ` A ) = if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) )

Syntax hints:   -> wi 4   = wceq 1395   e. wcel 2200   ifcif 3602   |-> cmpt 4145   `'ccnv 4718   -1-1-onto->wf1o 5317   ` cfv 5318  (class class class)co 6001   1c1 8000   - cmin 8317   ...cfz 10204

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-sep 4202  ax-pow 4258  ax-pr 4293  ax-un 4524  ax-setind 4629  ax-cnex 8090  ax-resscn 8091  ax-1cn 8092  ax-1re 8093  ax-icn 8094  ax-addcl 8095  ax-addrcl 8096  ax-mulcl 8097  ax-addcom 8099  ax-addass 8101  ax-distr 8103  ax-i2m1 8104  ax-0lt1 8105  ax-0id 8107  ax-rnegex 8108  ax-cnre 8110  ax-pre-ltirr 8111  ax-pre-ltwlin 8112  ax-pre-lttrn 8113  ax-pre-ltadd 8115

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-rab 2517  df-v 2801  df-sbc 3029  df-dif 3199  df-un 3201  df-in 3203  df-ss 3210  df-if 3603  df-pw 3651  df-sn 3672  df-pr 3673  df-op 3675  df-uni 3889  df-int 3924  df-br 4084  df-opab 4146  df-mpt 4147  df-id 4384  df-xp 4725  df-rel 4726  df-cnv 4727  df-co 4728  df-dm 4729  df-rn 4730  df-res 4731  df-ima 4732  df-iota 5278  df-fun 5320  df-fn 5321  df-f 5322  df-f1 5323  df-fo 5324  df-f1o 5325  df-fv 5326  df-riota 5954  df-ov 6004  df-oprab 6005  df-mpo 6006  df-pnf 8183  df-mnf 8184  df-xr 8185  df-ltxr 8186  df-le 8187  df-sub 8319  df-neg 8320  df-inn 9111  df-n0 9370  df-z 9447  df-uz 9723  df-fz 10205

This theorem is referenced by:  iseqf1olemnab  10723  iseqf1olemab  10724  iseqf1olemnanb  10725  iseqf1olemqk  10729  seq3f1olemqsumkj  10733  seq3f1olemqsumk  10734