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Mirrors > Home > ILE Home > Th. List > oddpwdc | GIF version |
Description: The function 𝐹 that decomposes a number into its "odd" and "even" parts, which is to say the largest power of two and largest odd divisor of a number, is a bijection from pairs of a nonnegative integer and an odd number to positive integers. (Contributed by Thierry Arnoux, 15-Aug-2017.) |
Ref | Expression |
---|---|
oddpwdc.j | ⊢ 𝐽 = {𝑧 ∈ ℕ ∣ ¬ 2 ∥ 𝑧} |
oddpwdc.f | ⊢ 𝐹 = (𝑥 ∈ 𝐽, 𝑦 ∈ ℕ0 ↦ ((2↑𝑦) · 𝑥)) |
Ref | Expression |
---|---|
oddpwdc | ⊢ 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | oddpwdc.f | . . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐽, 𝑦 ∈ ℕ0 ↦ ((2↑𝑦) · 𝑥)) | |
2 | 2cnd 8930 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 2 ∈ ℂ) | |
3 | simpr 109 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑦 ∈ ℕ0) | |
4 | 2, 3 | expcld 10588 | . . . . 5 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → (2↑𝑦) ∈ ℂ) |
5 | breq2 3986 | . . . . . . . . . 10 ⊢ (𝑧 = 𝑥 → (2 ∥ 𝑧 ↔ 2 ∥ 𝑥)) | |
6 | 5 | notbid 657 | . . . . . . . . 9 ⊢ (𝑧 = 𝑥 → (¬ 2 ∥ 𝑧 ↔ ¬ 2 ∥ 𝑥)) |
7 | oddpwdc.j | . . . . . . . . 9 ⊢ 𝐽 = {𝑧 ∈ ℕ ∣ ¬ 2 ∥ 𝑧} | |
8 | 6, 7 | elrab2 2885 | . . . . . . . 8 ⊢ (𝑥 ∈ 𝐽 ↔ (𝑥 ∈ ℕ ∧ ¬ 2 ∥ 𝑥)) |
9 | 8 | simplbi 272 | . . . . . . 7 ⊢ (𝑥 ∈ 𝐽 → 𝑥 ∈ ℕ) |
10 | 9 | adantr 274 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑥 ∈ ℕ) |
11 | 10 | nncnd 8871 | . . . . 5 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑥 ∈ ℂ) |
12 | 4, 11 | mulcld 7919 | . . . 4 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → ((2↑𝑦) · 𝑥) ∈ ℂ) |
13 | 12 | adantl 275 | . . 3 ⊢ ((⊤ ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0)) → ((2↑𝑦) · 𝑥) ∈ ℂ) |
14 | nnnn0 9121 | . . . . . 6 ⊢ (𝑎 ∈ ℕ → 𝑎 ∈ ℕ0) | |
15 | 2nn 9018 | . . . . . . 7 ⊢ 2 ∈ ℕ | |
16 | pw2dvdseu 12100 | . . . . . . . 8 ⊢ (𝑎 ∈ ℕ → ∃!𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)) | |
17 | riotacl 5812 | . . . . . . . 8 ⊢ (∃!𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎) → (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)) ∈ ℕ0) | |
18 | 16, 17 | syl 14 | . . . . . . 7 ⊢ (𝑎 ∈ ℕ → (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)) ∈ ℕ0) |
19 | nnexpcl 10468 | . . . . . . 7 ⊢ ((2 ∈ ℕ ∧ (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)) ∈ ℕ0) → (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎))) ∈ ℕ) | |
20 | 15, 18, 19 | sylancr 411 | . . . . . 6 ⊢ (𝑎 ∈ ℕ → (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎))) ∈ ℕ) |
21 | nn0nndivcl 9176 | . . . . . 6 ⊢ ((𝑎 ∈ ℕ0 ∧ (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎))) ∈ ℕ) → (𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∈ ℝ) | |
22 | 14, 20, 21 | syl2anc 409 | . . . . 5 ⊢ (𝑎 ∈ ℕ → (𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∈ ℝ) |
23 | 22, 18 | jca 304 | . . . 4 ⊢ (𝑎 ∈ ℕ → ((𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∈ ℝ ∧ (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)) ∈ ℕ0)) |
24 | 23 | adantl 275 | . . 3 ⊢ ((⊤ ∧ 𝑎 ∈ ℕ) → ((𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∈ ℝ ∧ (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)) ∈ ℕ0)) |
25 | 8 | anbi1i 454 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) ↔ ((𝑥 ∈ ℕ ∧ ¬ 2 ∥ 𝑥) ∧ 𝑦 ∈ ℕ0)) |
26 | 25 | anbi1i 454 | . . . . 5 ⊢ (((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) ∧ 𝑎 = ((2↑𝑦) · 𝑥)) ↔ (((𝑥 ∈ ℕ ∧ ¬ 2 ∥ 𝑥) ∧ 𝑦 ∈ ℕ0) ∧ 𝑎 = ((2↑𝑦) · 𝑥))) |
27 | oddpwdclemdc 12105 | . . . . 5 ⊢ ((((𝑥 ∈ ℕ ∧ ¬ 2 ∥ 𝑥) ∧ 𝑦 ∈ ℕ0) ∧ 𝑎 = ((2↑𝑦) · 𝑥)) ↔ (𝑎 ∈ ℕ ∧ (𝑥 = (𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∧ 𝑦 = (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎))))) | |
28 | 26, 27 | bitri 183 | . . . 4 ⊢ (((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) ∧ 𝑎 = ((2↑𝑦) · 𝑥)) ↔ (𝑎 ∈ ℕ ∧ (𝑥 = (𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∧ 𝑦 = (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎))))) |
29 | 28 | a1i 9 | . . 3 ⊢ (⊤ → (((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) ∧ 𝑎 = ((2↑𝑦) · 𝑥)) ↔ (𝑎 ∈ ℕ ∧ (𝑥 = (𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∧ 𝑦 = (℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))))) |
30 | 1, 13, 24, 29 | f1od2 6203 | . 2 ⊢ (⊤ → 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ) |
31 | 30 | mptru 1352 | 1 ⊢ 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 ∧ wa 103 ↔ wb 104 = wceq 1343 ⊤wtru 1344 ∈ wcel 2136 ∃!wreu 2446 {crab 2448 class class class wbr 3982 × cxp 4602 –1-1-onto→wf1o 5187 ℩crio 5797 (class class class)co 5842 ∈ cmpo 5844 ℂcc 7751 ℝcr 7752 1c1 7754 + caddc 7756 · cmul 7758 / cdiv 8568 ℕcn 8857 2c2 8908 ℕ0cn0 9114 ↑cexp 10454 ∥ cdvds 11727 |
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 604 ax-in2 605 ax-io 699 ax-5 1435 ax-7 1436 ax-gen 1437 ax-ie1 1481 ax-ie2 1482 ax-8 1492 ax-10 1493 ax-11 1494 ax-i12 1495 ax-bndl 1497 ax-4 1498 ax-17 1514 ax-i9 1518 ax-ial 1522 ax-i5r 1523 ax-13 2138 ax-14 2139 ax-ext 2147 ax-coll 4097 ax-sep 4100 ax-nul 4108 ax-pow 4153 ax-pr 4187 ax-un 4411 ax-setind 4514 ax-iinf 4565 ax-cnex 7844 ax-resscn 7845 ax-1cn 7846 ax-1re 7847 ax-icn 7848 ax-addcl 7849 ax-addrcl 7850 ax-mulcl 7851 ax-mulrcl 7852 ax-addcom 7853 ax-mulcom 7854 ax-addass 7855 ax-mulass 7856 ax-distr 7857 ax-i2m1 7858 ax-0lt1 7859 ax-1rid 7860 ax-0id 7861 ax-rnegex 7862 ax-precex 7863 ax-cnre 7864 ax-pre-ltirr 7865 ax-pre-ltwlin 7866 ax-pre-lttrn 7867 ax-pre-apti 7868 ax-pre-ltadd 7869 ax-pre-mulgt0 7870 ax-pre-mulext 7871 ax-arch 7872 |
This theorem depends on definitions: df-bi 116 df-dc 825 df-3or 969 df-3an 970 df-tru 1346 df-fal 1349 df-nf 1449 df-sb 1751 df-eu 2017 df-mo 2018 df-clab 2152 df-cleq 2158 df-clel 2161 df-nfc 2297 df-ne 2337 df-nel 2432 df-ral 2449 df-rex 2450 df-reu 2451 df-rmo 2452 df-rab 2453 df-v 2728 df-sbc 2952 df-csb 3046 df-dif 3118 df-un 3120 df-in 3122 df-ss 3129 df-nul 3410 df-if 3521 df-pw 3561 df-sn 3582 df-pr 3583 df-op 3585 df-uni 3790 df-int 3825 df-iun 3868 df-br 3983 df-opab 4044 df-mpt 4045 df-tr 4081 df-id 4271 df-po 4274 df-iso 4275 df-iord 4344 df-on 4346 df-ilim 4347 df-suc 4349 df-iom 4568 df-xp 4610 df-rel 4611 df-cnv 4612 df-co 4613 df-dm 4614 df-rn 4615 df-res 4616 df-ima 4617 df-iota 5153 df-fun 5190 df-fn 5191 df-f 5192 df-f1 5193 df-fo 5194 df-f1o 5195 df-fv 5196 df-riota 5798 df-ov 5845 df-oprab 5846 df-mpo 5847 df-1st 6108 df-2nd 6109 df-recs 6273 df-frec 6359 df-pnf 7935 df-mnf 7936 df-xr 7937 df-ltxr 7938 df-le 7939 df-sub 8071 df-neg 8072 df-reap 8473 df-ap 8480 df-div 8569 df-inn 8858 df-2 8916 df-n0 9115 df-z 9192 df-uz 9467 df-q 9558 df-rp 9590 df-fz 9945 df-fl 10205 df-mod 10258 df-seqfrec 10381 df-exp 10455 df-dvds 11728 |
This theorem is referenced by: sqpweven 12107 2sqpwodd 12108 xpnnen 12327 |
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