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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 9057 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 2 ∈ ℂ) | |
3 | simpr 110 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑦 ∈ ℕ0) | |
4 | 2, 3 | expcld 10747 | . . . . 5 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → (2↑𝑦) ∈ ℂ) |
5 | breq2 4034 | . . . . . . . . . 10 ⊢ (𝑧 = 𝑥 → (2 ∥ 𝑧 ↔ 2 ∥ 𝑥)) | |
6 | 5 | notbid 668 | . . . . . . . . 9 ⊢ (𝑧 = 𝑥 → (¬ 2 ∥ 𝑧 ↔ ¬ 2 ∥ 𝑥)) |
7 | oddpwdc.j | . . . . . . . . 9 ⊢ 𝐽 = {𝑧 ∈ ℕ ∣ ¬ 2 ∥ 𝑧} | |
8 | 6, 7 | elrab2 2920 | . . . . . . . 8 ⊢ (𝑥 ∈ 𝐽 ↔ (𝑥 ∈ ℕ ∧ ¬ 2 ∥ 𝑥)) |
9 | 8 | simplbi 274 | . . . . . . 7 ⊢ (𝑥 ∈ 𝐽 → 𝑥 ∈ ℕ) |
10 | 9 | adantr 276 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑥 ∈ ℕ) |
11 | 10 | nncnd 8998 | . . . . 5 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑥 ∈ ℂ) |
12 | 4, 11 | mulcld 8042 | . . . 4 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → ((2↑𝑦) · 𝑥) ∈ ℂ) |
13 | 12 | adantl 277 | . . 3 ⊢ ((⊤ ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0)) → ((2↑𝑦) · 𝑥) ∈ ℂ) |
14 | nnnn0 9250 | . . . . . 6 ⊢ (𝑎 ∈ ℕ → 𝑎 ∈ ℕ0) | |
15 | 2nn 9146 | . . . . . . 7 ⊢ 2 ∈ ℕ | |
16 | pw2dvdseu 12309 | . . . . . . . 8 ⊢ (𝑎 ∈ ℕ → ∃!𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)) | |
17 | riotacl 5889 | . . . . . . . 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 10626 | . . . . . . 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 414 | . . . . . 6 ⊢ (𝑎 ∈ ℕ → (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎))) ∈ ℕ) |
21 | nn0nndivcl 9305 | . . . . . 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 411 | . . . . 5 ⊢ (𝑎 ∈ ℕ → (𝑎 / (2↑(℩𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎)))) ∈ ℝ) |
23 | 22, 18 | jca 306 | . . . 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 277 | . . 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 458 | . . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) ↔ ((𝑥 ∈ ℕ ∧ ¬ 2 ∥ 𝑥) ∧ 𝑦 ∈ ℕ0)) |
26 | 25 | anbi1i 458 | . . . . 5 ⊢ (((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) ∧ 𝑎 = ((2↑𝑦) · 𝑥)) ↔ (((𝑥 ∈ ℕ ∧ ¬ 2 ∥ 𝑥) ∧ 𝑦 ∈ ℕ0) ∧ 𝑎 = ((2↑𝑦) · 𝑥))) |
27 | oddpwdclemdc 12314 | . . . . 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 184 | . . . 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 6290 | . 2 ⊢ (⊤ → 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ) |
31 | 30 | mptru 1373 | 1 ⊢ 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ |
Colors of variables: wff set class |
Syntax hints: ¬ wn 3 ∧ wa 104 ↔ wb 105 = wceq 1364 ⊤wtru 1365 ∈ wcel 2164 ∃!wreu 2474 {crab 2476 class class class wbr 4030 × cxp 4658 –1-1-onto→wf1o 5254 ℩crio 5873 (class class class)co 5919 ∈ cmpo 5921 ℂcc 7872 ℝcr 7873 1c1 7875 + caddc 7877 · cmul 7879 / cdiv 8693 ℕcn 8984 2c2 9035 ℕ0cn0 9243 ↑cexp 10612 ∥ cdvds 11933 |
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 615 ax-in2 616 ax-io 710 ax-5 1458 ax-7 1459 ax-gen 1460 ax-ie1 1504 ax-ie2 1505 ax-8 1515 ax-10 1516 ax-11 1517 ax-i12 1518 ax-bndl 1520 ax-4 1521 ax-17 1537 ax-i9 1541 ax-ial 1545 ax-i5r 1546 ax-13 2166 ax-14 2167 ax-ext 2175 ax-coll 4145 ax-sep 4148 ax-nul 4156 ax-pow 4204 ax-pr 4239 ax-un 4465 ax-setind 4570 ax-iinf 4621 ax-cnex 7965 ax-resscn 7966 ax-1cn 7967 ax-1re 7968 ax-icn 7969 ax-addcl 7970 ax-addrcl 7971 ax-mulcl 7972 ax-mulrcl 7973 ax-addcom 7974 ax-mulcom 7975 ax-addass 7976 ax-mulass 7977 ax-distr 7978 ax-i2m1 7979 ax-0lt1 7980 ax-1rid 7981 ax-0id 7982 ax-rnegex 7983 ax-precex 7984 ax-cnre 7985 ax-pre-ltirr 7986 ax-pre-ltwlin 7987 ax-pre-lttrn 7988 ax-pre-apti 7989 ax-pre-ltadd 7990 ax-pre-mulgt0 7991 ax-pre-mulext 7992 ax-arch 7993 |
This theorem depends on definitions: df-bi 117 df-dc 836 df-3or 981 df-3an 982 df-tru 1367 df-fal 1370 df-nf 1472 df-sb 1774 df-eu 2045 df-mo 2046 df-clab 2180 df-cleq 2186 df-clel 2189 df-nfc 2325 df-ne 2365 df-nel 2460 df-ral 2477 df-rex 2478 df-reu 2479 df-rmo 2480 df-rab 2481 df-v 2762 df-sbc 2987 df-csb 3082 df-dif 3156 df-un 3158 df-in 3160 df-ss 3167 df-nul 3448 df-if 3559 df-pw 3604 df-sn 3625 df-pr 3626 df-op 3628 df-uni 3837 df-int 3872 df-iun 3915 df-br 4031 df-opab 4092 df-mpt 4093 df-tr 4129 df-id 4325 df-po 4328 df-iso 4329 df-iord 4398 df-on 4400 df-ilim 4401 df-suc 4403 df-iom 4624 df-xp 4666 df-rel 4667 df-cnv 4668 df-co 4669 df-dm 4670 df-rn 4671 df-res 4672 df-ima 4673 df-iota 5216 df-fun 5257 df-fn 5258 df-f 5259 df-f1 5260 df-fo 5261 df-f1o 5262 df-fv 5263 df-riota 5874 df-ov 5922 df-oprab 5923 df-mpo 5924 df-1st 6195 df-2nd 6196 df-recs 6360 df-frec 6446 df-pnf 8058 df-mnf 8059 df-xr 8060 df-ltxr 8061 df-le 8062 df-sub 8194 df-neg 8195 df-reap 8596 df-ap 8603 df-div 8694 df-inn 8985 df-2 9043 df-n0 9244 df-z 9321 df-uz 9596 df-q 9688 df-rp 9723 df-fz 10078 df-fl 10342 df-mod 10397 df-seqfrec 10522 df-exp 10613 df-dvds 11934 |
This theorem is referenced by: sqpweven 12316 2sqpwodd 12317 xpnnen 12554 |
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