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Mirrors > Home > ILE Home > Th. List > iseqf1olemqval | GIF version |
Description: Lemma for seq3f1o 10449. Value of the function 𝑄. (Contributed by Jim Kingdon, 28-Aug-2022.) |
Ref | Expression |
---|---|
iseqf1olemqcl.k | ⊢ (𝜑 → 𝐾 ∈ (𝑀...𝑁)) |
iseqf1olemqcl.j | ⊢ (𝜑 → 𝐽:(𝑀...𝑁)–1-1-onto→(𝑀...𝑁)) |
iseqf1olemqcl.a | ⊢ (𝜑 → 𝐴 ∈ (𝑀...𝑁)) |
iseqf1olemqval.q | ⊢ 𝑄 = (𝑢 ∈ (𝑀...𝑁) ↦ if(𝑢 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝑢 = 𝐾, 𝐾, (𝐽‘(𝑢 − 1))), (𝐽‘𝑢))) |
Ref | Expression |
---|---|
iseqf1olemqval | ⊢ (𝜑 → (𝑄‘𝐴) = if(𝐴 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝐴 = 𝐾, 𝐾, (𝐽‘(𝐴 − 1))), (𝐽‘𝐴))) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | iseqf1olemqcl.a | . 2 ⊢ (𝜑 → 𝐴 ∈ (𝑀...𝑁)) | |
2 | iseqf1olemqcl.k | . . 3 ⊢ (𝜑 → 𝐾 ∈ (𝑀...𝑁)) | |
3 | iseqf1olemqcl.j | . . 3 ⊢ (𝜑 → 𝐽:(𝑀...𝑁)–1-1-onto→(𝑀...𝑁)) | |
4 | 2, 3, 1 | iseqf1olemqcl 10431 | . 2 ⊢ (𝜑 → if(𝐴 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝐴 = 𝐾, 𝐾, (𝐽‘(𝐴 − 1))), (𝐽‘𝐴)) ∈ (𝑀...𝑁)) |
5 | eleq1 2233 | . . . 4 ⊢ (𝑢 = 𝐴 → (𝑢 ∈ (𝐾...(◡𝐽‘𝐾)) ↔ 𝐴 ∈ (𝐾...(◡𝐽‘𝐾)))) | |
6 | eqeq1 2177 | . . . . 5 ⊢ (𝑢 = 𝐴 → (𝑢 = 𝐾 ↔ 𝐴 = 𝐾)) | |
7 | oveq1 5858 | . . . . . 6 ⊢ (𝑢 = 𝐴 → (𝑢 − 1) = (𝐴 − 1)) | |
8 | 7 | fveq2d 5498 | . . . . 5 ⊢ (𝑢 = 𝐴 → (𝐽‘(𝑢 − 1)) = (𝐽‘(𝐴 − 1))) |
9 | 6, 8 | ifbieq2d 3549 | . . . 4 ⊢ (𝑢 = 𝐴 → if(𝑢 = 𝐾, 𝐾, (𝐽‘(𝑢 − 1))) = if(𝐴 = 𝐾, 𝐾, (𝐽‘(𝐴 − 1)))) |
10 | fveq2 5494 | . . . 4 ⊢ (𝑢 = 𝐴 → (𝐽‘𝑢) = (𝐽‘𝐴)) | |
11 | 5, 9, 10 | ifbieq12d 3551 | . . 3 ⊢ (𝑢 = 𝐴 → if(𝑢 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝑢 = 𝐾, 𝐾, (𝐽‘(𝑢 − 1))), (𝐽‘𝑢)) = if(𝐴 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝐴 = 𝐾, 𝐾, (𝐽‘(𝐴 − 1))), (𝐽‘𝐴))) |
12 | iseqf1olemqval.q | . . 3 ⊢ 𝑄 = (𝑢 ∈ (𝑀...𝑁) ↦ if(𝑢 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝑢 = 𝐾, 𝐾, (𝐽‘(𝑢 − 1))), (𝐽‘𝑢))) | |
13 | 11, 12 | fvmptg 5570 | . 2 ⊢ ((𝐴 ∈ (𝑀...𝑁) ∧ if(𝐴 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝐴 = 𝐾, 𝐾, (𝐽‘(𝐴 − 1))), (𝐽‘𝐴)) ∈ (𝑀...𝑁)) → (𝑄‘𝐴) = if(𝐴 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝐴 = 𝐾, 𝐾, (𝐽‘(𝐴 − 1))), (𝐽‘𝐴))) |
14 | 1, 4, 13 | syl2anc 409 | 1 ⊢ (𝜑 → (𝑄‘𝐴) = if(𝐴 ∈ (𝐾...(◡𝐽‘𝐾)), if(𝐴 = 𝐾, 𝐾, (𝐽‘(𝐴 − 1))), (𝐽‘𝐴))) |
Colors of variables: wff set class |
Syntax hints: → wi 4 = wceq 1348 ∈ wcel 2141 ifcif 3525 ↦ cmpt 4048 ◡ccnv 4608 –1-1-onto→wf1o 5195 ‘cfv 5196 (class class class)co 5851 1c1 7764 − cmin 8079 ...cfz 9954 |
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 4105 ax-pow 4158 ax-pr 4192 ax-un 4416 ax-setind 4519 ax-cnex 7854 ax-resscn 7855 ax-1cn 7856 ax-1re 7857 ax-icn 7858 ax-addcl 7859 ax-addrcl 7860 ax-mulcl 7861 ax-addcom 7863 ax-addass 7865 ax-distr 7867 ax-i2m1 7868 ax-0lt1 7869 ax-0id 7871 ax-rnegex 7872 ax-cnre 7874 ax-pre-ltirr 7875 ax-pre-ltwlin 7876 ax-pre-lttrn 7877 ax-pre-ltadd 7879 |
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 3526 df-pw 3566 df-sn 3587 df-pr 3588 df-op 3590 df-uni 3795 df-int 3830 df-br 3988 df-opab 4049 df-mpt 4050 df-id 4276 df-xp 4615 df-rel 4616 df-cnv 4617 df-co 4618 df-dm 4619 df-rn 4620 df-res 4621 df-ima 4622 df-iota 5158 df-fun 5198 df-fn 5199 df-f 5200 df-f1 5201 df-fo 5202 df-f1o 5203 df-fv 5204 df-riota 5807 df-ov 5854 df-oprab 5855 df-mpo 5856 df-pnf 7945 df-mnf 7946 df-xr 7947 df-ltxr 7948 df-le 7949 df-sub 8081 df-neg 8082 df-inn 8868 df-n0 9125 df-z 9202 df-uz 9477 df-fz 9955 |
This theorem is referenced by: iseqf1olemnab 10433 iseqf1olemab 10434 iseqf1olemnanb 10435 iseqf1olemqk 10439 seq3f1olemqsumkj 10443 seq3f1olemqsumk 10444 |
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