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Mirrors > Home > MPE Home > Th. List > rpnnen2lem1 | Structured version Visualization version GIF version |
Description: Lemma for rpnnen2 15935. (Contributed by Mario Carneiro, 13-May-2013.) |
Ref | Expression |
---|---|
rpnnen2.1 | ⊢ 𝐹 = (𝑥 ∈ 𝒫 ℕ ↦ (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0))) |
Ref | Expression |
---|---|
rpnnen2lem1 | ⊢ ((𝐴 ⊆ ℕ ∧ 𝑁 ∈ ℕ) → ((𝐹‘𝐴)‘𝑁) = if(𝑁 ∈ 𝐴, ((1 / 3)↑𝑁), 0)) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnex 11979 | . . . . 5 ⊢ ℕ ∈ V | |
2 | 1 | elpw2 5269 | . . . 4 ⊢ (𝐴 ∈ 𝒫 ℕ ↔ 𝐴 ⊆ ℕ) |
3 | eleq2 2827 | . . . . . . 7 ⊢ (𝑥 = 𝐴 → (𝑛 ∈ 𝑥 ↔ 𝑛 ∈ 𝐴)) | |
4 | 3 | ifbid 4482 | . . . . . 6 ⊢ (𝑥 = 𝐴 → if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0) = if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0)) |
5 | 4 | mpteq2dv 5176 | . . . . 5 ⊢ (𝑥 = 𝐴 → (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0)) = (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))) |
6 | rpnnen2.1 | . . . . 5 ⊢ 𝐹 = (𝑥 ∈ 𝒫 ℕ ↦ (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0))) | |
7 | 1 | mptex 7099 | . . . . 5 ⊢ (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0)) ∈ V |
8 | 5, 6, 7 | fvmpt 6875 | . . . 4 ⊢ (𝐴 ∈ 𝒫 ℕ → (𝐹‘𝐴) = (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))) |
9 | 2, 8 | sylbir 234 | . . 3 ⊢ (𝐴 ⊆ ℕ → (𝐹‘𝐴) = (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))) |
10 | 9 | fveq1d 6776 | . 2 ⊢ (𝐴 ⊆ ℕ → ((𝐹‘𝐴)‘𝑁) = ((𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))‘𝑁)) |
11 | eleq1 2826 | . . . 4 ⊢ (𝑛 = 𝑁 → (𝑛 ∈ 𝐴 ↔ 𝑁 ∈ 𝐴)) | |
12 | oveq2 7283 | . . . 4 ⊢ (𝑛 = 𝑁 → ((1 / 3)↑𝑛) = ((1 / 3)↑𝑁)) | |
13 | 11, 12 | ifbieq1d 4483 | . . 3 ⊢ (𝑛 = 𝑁 → if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0) = if(𝑁 ∈ 𝐴, ((1 / 3)↑𝑁), 0)) |
14 | eqid 2738 | . . 3 ⊢ (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0)) = (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0)) | |
15 | ovex 7308 | . . . 4 ⊢ ((1 / 3)↑𝑁) ∈ V | |
16 | c0ex 10969 | . . . 4 ⊢ 0 ∈ V | |
17 | 15, 16 | ifex 4509 | . . 3 ⊢ if(𝑁 ∈ 𝐴, ((1 / 3)↑𝑁), 0) ∈ V |
18 | 13, 14, 17 | fvmpt 6875 | . 2 ⊢ (𝑁 ∈ ℕ → ((𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))‘𝑁) = if(𝑁 ∈ 𝐴, ((1 / 3)↑𝑁), 0)) |
19 | 10, 18 | sylan9eq 2798 | 1 ⊢ ((𝐴 ⊆ ℕ ∧ 𝑁 ∈ ℕ) → ((𝐹‘𝐴)‘𝑁) = if(𝑁 ∈ 𝐴, ((1 / 3)↑𝑁), 0)) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 ∧ wa 396 = wceq 1539 ∈ wcel 2106 ⊆ wss 3887 ifcif 4459 𝒫 cpw 4533 ↦ cmpt 5157 ‘cfv 6433 (class class class)co 7275 0cc0 10871 1c1 10872 / cdiv 11632 ℕcn 11973 3c3 12029 ↑cexp 13782 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1798 ax-4 1812 ax-5 1913 ax-6 1971 ax-7 2011 ax-8 2108 ax-9 2116 ax-10 2137 ax-11 2154 ax-12 2171 ax-ext 2709 ax-rep 5209 ax-sep 5223 ax-nul 5230 ax-pr 5352 ax-un 7588 ax-cnex 10927 ax-1cn 10929 ax-icn 10930 ax-addcl 10931 ax-mulcl 10933 ax-i2m1 10939 |
This theorem depends on definitions: df-bi 206 df-an 397 df-or 845 df-3or 1087 df-3an 1088 df-tru 1542 df-fal 1552 df-ex 1783 df-nf 1787 df-sb 2068 df-mo 2540 df-eu 2569 df-clab 2716 df-cleq 2730 df-clel 2816 df-nfc 2889 df-ne 2944 df-ral 3069 df-rex 3070 df-reu 3072 df-rab 3073 df-v 3434 df-sbc 3717 df-csb 3833 df-dif 3890 df-un 3892 df-in 3894 df-ss 3904 df-pss 3906 df-nul 4257 df-if 4460 df-pw 4535 df-sn 4562 df-pr 4564 df-op 4568 df-uni 4840 df-iun 4926 df-br 5075 df-opab 5137 df-mpt 5158 df-tr 5192 df-id 5489 df-eprel 5495 df-po 5503 df-so 5504 df-fr 5544 df-we 5546 df-xp 5595 df-rel 5596 df-cnv 5597 df-co 5598 df-dm 5599 df-rn 5600 df-res 5601 df-ima 5602 df-pred 6202 df-ord 6269 df-on 6270 df-lim 6271 df-suc 6272 df-iota 6391 df-fun 6435 df-fn 6436 df-f 6437 df-f1 6438 df-fo 6439 df-f1o 6440 df-fv 6441 df-ov 7278 df-om 7713 df-2nd 7832 df-frecs 8097 df-wrecs 8128 df-recs 8202 df-rdg 8241 df-nn 11974 |
This theorem is referenced by: rpnnen2lem3 15925 rpnnen2lem4 15926 rpnnen2lem9 15931 rpnnen2lem10 15932 rpnnen2lem11 15933 |
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