Theorem iseqf1olemqval 10891

Description: Lemma for seq3f1o 10908. 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 10890	. 2 |- ( ph -> if ( A e. ( K ... ( `' J ` K ) ) , if ( A = K , K , ( J ` ( A - 1 ) ) ) , ( J ` A ) ) e. ( M ... N ) )
5		eleq1 2297	. . . 4 |- ( u = A -> ( u e. ( K ... ( `' J ` K ) ) <-> A e. ( K ... ( `' J ` K ) ) ) )
6		eqeq1 2241	. . . . 5 |- ( u = A -> ( u = K <-> A = K ) )
7		oveq1 6067	. . . . . 6 |- ( u = A -> ( u - 1 ) = ( A - 1 ) )
8	7	fveq2d 5681	. . . . 5 |- ( u = A -> ( J ` ( u - 1 ) ) = ( J ` ( A - 1 ) ) )
9	6, 8	ifbieq2d 3652	. . . 4 |- ( u = A -> if ( u = K , K , ( J ` ( u - 1 ) ) ) = if ( A = K , K , ( J ` ( A - 1 ) ) ) )
10		fveq2 5677	. . . 4 |- ( u = A -> ( J ` u ) = ( J ` A ) )
11	5, 9, 10	ifbieq12d 3654	. . 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 5760	. 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 1398   e. wcel 2205   ifcif 3625   |-> cmpt 4177   `'ccnv 4755   -1-1-onto->wf1o 5358   ` cfv 5359  (class class class)co 6060   1c1 8146   - cmin 8463   ...cfz 10366

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 619  ax-in2 620  ax-io 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2208  ax-ext 2216  ax-sep 4234  ax-pow 4293  ax-pr 4328  ax-un 4560  ax-setind 4666  ax-cnex 8236  ax-resscn 8237  ax-1cn 8238  ax-1re 8239  ax-icn 8240  ax-addcl 8241  ax-addrcl 8242  ax-mulcl 8243  ax-addcom 8245  ax-addass 8247  ax-distr 8249  ax-i2m1 8250  ax-0lt1 8251  ax-0id 8253  ax-rnegex 8254  ax-cnre 8256  ax-pre-ltirr 8257  ax-pre-ltwlin 8258  ax-pre-lttrn 8259  ax-pre-ltadd 8261

This theorem depends on definitions:  df-bi 117  df-dc 843  df-3or 1006  df-3an 1007  df-tru 1401  df-fal 1404  df-nf 1510  df-sb 1812  df-eu 2085  df-mo 2086  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-nel 2510  df-ral 2527  df-rex 2528  df-reu 2529  df-rab 2531  df-v 2817  df-sbc 3046  df-dif 3216  df-un 3218  df-in 3220  df-ss 3227  df-if 3626  df-pw 3677  df-sn 3701  df-pr 3702  df-op 3704  df-uni 3921  df-int 3956  df-br 4116  df-opab 4178  df-mpt 4179  df-id 4420  df-xp 4762  df-rel 4763  df-cnv 4764  df-co 4765  df-dm 4766  df-rn 4767  df-res 4768  df-ima 4769  df-iota 5319  df-fun 5361  df-fn 5362  df-f 5363  df-f1 5364  df-fo 5365  df-f1o 5366  df-fv 5367  df-riota 6013  df-ov 6063  df-oprab 6064  df-mpo 6065  df-pnf 8328  df-mnf 8329  df-xr 8330  df-ltxr 8331  df-le 8332  df-sub 8465  df-neg 8466  df-inn 9260  df-n0 9519  df-z 9600  df-uz 9877  df-fz 10367

This theorem is referenced by:  iseqf1olemnab  10892  iseqf1olemab  10893  iseqf1olemnanb  10894  iseqf1olemqk  10898  seq3f1olemqsumkj  10902  seq3f1olemqsumk  10903