Metamath Proof Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > MPE Home > Th. List > rpnnen2lem2 | Structured version Visualization version GIF version |
Description: Lemma for rpnnen2 15916. (Contributed by Mario Carneiro, 13-May-2013.) (Revised by Mario Carneiro, 23-Aug-2014.) |
Ref | Expression |
---|---|
rpnnen2.1 | ⊢ 𝐹 = (𝑥 ∈ 𝒫 ℕ ↦ (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0))) |
Ref | Expression |
---|---|
rpnnen2lem2 | ⊢ (𝐴 ⊆ ℕ → (𝐹‘𝐴):ℕ⟶ℝ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | nnex 11962 | . . . 4 ⊢ ℕ ∈ V | |
2 | 1 | elpw2 5272 | . . 3 ⊢ (𝐴 ∈ 𝒫 ℕ ↔ 𝐴 ⊆ ℕ) |
3 | eleq2 2828 | . . . . . 6 ⊢ (𝑥 = 𝐴 → (𝑛 ∈ 𝑥 ↔ 𝑛 ∈ 𝐴)) | |
4 | 3 | ifbid 4487 | . . . . 5 ⊢ (𝑥 = 𝐴 → if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0) = if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0)) |
5 | 4 | mpteq2dv 5180 | . . . 4 ⊢ (𝑥 = 𝐴 → (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0)) = (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))) |
6 | rpnnen2.1 | . . . 4 ⊢ 𝐹 = (𝑥 ∈ 𝒫 ℕ ↦ (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝑥, ((1 / 3)↑𝑛), 0))) | |
7 | 1 | mptex 7093 | . . . 4 ⊢ (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0)) ∈ V |
8 | 5, 6, 7 | fvmpt 6869 | . . 3 ⊢ (𝐴 ∈ 𝒫 ℕ → (𝐹‘𝐴) = (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))) |
9 | 2, 8 | sylbir 234 | . 2 ⊢ (𝐴 ⊆ ℕ → (𝐹‘𝐴) = (𝑛 ∈ ℕ ↦ if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0))) |
10 | 1re 10959 | . . . . . 6 ⊢ 1 ∈ ℝ | |
11 | 3nn 12035 | . . . . . 6 ⊢ 3 ∈ ℕ | |
12 | nndivre 11997 | . . . . . 6 ⊢ ((1 ∈ ℝ ∧ 3 ∈ ℕ) → (1 / 3) ∈ ℝ) | |
13 | 10, 11, 12 | mp2an 688 | . . . . 5 ⊢ (1 / 3) ∈ ℝ |
14 | nnnn0 12223 | . . . . 5 ⊢ (𝑛 ∈ ℕ → 𝑛 ∈ ℕ0) | |
15 | reexpcl 13780 | . . . . 5 ⊢ (((1 / 3) ∈ ℝ ∧ 𝑛 ∈ ℕ0) → ((1 / 3)↑𝑛) ∈ ℝ) | |
16 | 13, 14, 15 | sylancr 586 | . . . 4 ⊢ (𝑛 ∈ ℕ → ((1 / 3)↑𝑛) ∈ ℝ) |
17 | 0re 10961 | . . . 4 ⊢ 0 ∈ ℝ | |
18 | ifcl 4509 | . . . 4 ⊢ ((((1 / 3)↑𝑛) ∈ ℝ ∧ 0 ∈ ℝ) → if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0) ∈ ℝ) | |
19 | 16, 17, 18 | sylancl 585 | . . 3 ⊢ (𝑛 ∈ ℕ → if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0) ∈ ℝ) |
20 | 19 | adantl 481 | . 2 ⊢ ((𝐴 ⊆ ℕ ∧ 𝑛 ∈ ℕ) → if(𝑛 ∈ 𝐴, ((1 / 3)↑𝑛), 0) ∈ ℝ) |
21 | 9, 20 | fmpt3d 6984 | 1 ⊢ (𝐴 ⊆ ℕ → (𝐹‘𝐴):ℕ⟶ℝ) |
Colors of variables: wff setvar class |
Syntax hints: → wi 4 = wceq 1541 ∈ wcel 2109 ⊆ wss 3891 ifcif 4464 𝒫 cpw 4538 ↦ cmpt 5161 ⟶wf 6426 ‘cfv 6430 (class class class)co 7268 ℝcr 10854 0cc0 10855 1c1 10856 / cdiv 11615 ℕcn 11956 3c3 12012 ℕ0cn0 12216 ↑cexp 13763 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 ax-gen 1801 ax-4 1815 ax-5 1916 ax-6 1974 ax-7 2014 ax-8 2111 ax-9 2119 ax-10 2140 ax-11 2157 ax-12 2174 ax-ext 2710 ax-rep 5213 ax-sep 5226 ax-nul 5233 ax-pow 5291 ax-pr 5355 ax-un 7579 ax-cnex 10911 ax-resscn 10912 ax-1cn 10913 ax-icn 10914 ax-addcl 10915 ax-addrcl 10916 ax-mulcl 10917 ax-mulrcl 10918 ax-mulcom 10919 ax-addass 10920 ax-mulass 10921 ax-distr 10922 ax-i2m1 10923 ax-1ne0 10924 ax-1rid 10925 ax-rnegex 10926 ax-rrecex 10927 ax-cnre 10928 ax-pre-lttri 10929 ax-pre-lttrn 10930 ax-pre-ltadd 10931 ax-pre-mulgt0 10932 |
This theorem depends on definitions: df-bi 206 df-an 396 df-or 844 df-3or 1086 df-3an 1087 df-tru 1544 df-fal 1554 df-ex 1786 df-nf 1790 df-sb 2071 df-mo 2541 df-eu 2570 df-clab 2717 df-cleq 2731 df-clel 2817 df-nfc 2890 df-ne 2945 df-nel 3051 df-ral 3070 df-rex 3071 df-reu 3072 df-rmo 3073 df-rab 3074 df-v 3432 df-sbc 3720 df-csb 3837 df-dif 3894 df-un 3896 df-in 3898 df-ss 3908 df-pss 3910 df-nul 4262 df-if 4465 df-pw 4540 df-sn 4567 df-pr 4569 df-tp 4571 df-op 4573 df-uni 4845 df-iun 4931 df-br 5079 df-opab 5141 df-mpt 5162 df-tr 5196 df-id 5488 df-eprel 5494 df-po 5502 df-so 5503 df-fr 5543 df-we 5545 df-xp 5594 df-rel 5595 df-cnv 5596 df-co 5597 df-dm 5598 df-rn 5599 df-res 5600 df-ima 5601 df-pred 6199 df-ord 6266 df-on 6267 df-lim 6268 df-suc 6269 df-iota 6388 df-fun 6432 df-fn 6433 df-f 6434 df-f1 6435 df-fo 6436 df-f1o 6437 df-fv 6438 df-riota 7225 df-ov 7271 df-oprab 7272 df-mpo 7273 df-om 7701 df-2nd 7818 df-frecs 8081 df-wrecs 8112 df-recs 8186 df-rdg 8225 df-er 8472 df-en 8708 df-dom 8709 df-sdom 8710 df-pnf 10995 df-mnf 10996 df-xr 10997 df-ltxr 10998 df-le 10999 df-sub 11190 df-neg 11191 df-div 11616 df-nn 11957 df-2 12019 df-3 12020 df-n0 12217 df-z 12303 df-uz 12565 df-seq 13703 df-exp 13764 |
This theorem is referenced by: rpnnen2lem5 15908 rpnnen2lem6 15909 rpnnen2lem7 15910 rpnnen2lem8 15911 rpnnen2lem9 15912 rpnnen2lem10 15913 rpnnen2lem12 15915 |
Copyright terms: Public domain | W3C validator |