Theorem oddpwdc 12352

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.)

Hypotheses

Ref	Expression
oddpwdc.j	⊢ 𝐽 = {𝑧 ∈ ℕ ∣ ¬ 2 ∥ 𝑧}
oddpwdc.f	⊢ 𝐹 = (𝑥 ∈ 𝐽, 𝑦 ∈ ℕ0 ↦ ((2↑𝑦) · 𝑥))

Assertion

Ref	Expression
oddpwdc	⊢ 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ

Distinct variable groups:   𝑥,𝑦,𝑧   𝑥,𝐽,𝑦

Allowed substitution hints:   𝐹(𝑥,𝑦,𝑧)   𝐽(𝑧)

Proof of Theorem oddpwdc

Dummy variable 𝑎 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		oddpwdc.f	. . 3 ⊢ 𝐹 = (𝑥 ∈ 𝐽, 𝑦 ∈ ℕ0 ↦ ((2↑𝑦) · 𝑥))
2		2cnd 9065	. . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 2 ∈ ℂ)
3		simpr 110	. . . . . 6 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑦 ∈ ℕ0)
4	2, 3	expcld 10767	. . . . 5 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → (2↑𝑦) ∈ ℂ)
5		breq2 4038	. . . . . . . . . 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 2923	. . . . . . . 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 9006	. . . . 5 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → 𝑥 ∈ ℂ)
12	4, 11	mulcld 8049	. . . 4 ⊢ ((𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0) → ((2↑𝑦) · 𝑥) ∈ ℂ)
13	12	adantl 277	. . 3 ⊢ ((⊤ ∧ (𝑥 ∈ 𝐽 ∧ 𝑦 ∈ ℕ0)) → ((2↑𝑦) · 𝑥) ∈ ℂ)
14		nnnn0 9258	. . . . . 6 ⊢ (𝑎 ∈ ℕ → 𝑎 ∈ ℕ0)
15		2nn 9154	. . . . . . 7 ⊢ 2 ∈ ℕ
16		pw2dvdseu 12346	. . . . . . . 8 ⊢ (𝑎 ∈ ℕ → ∃!𝑧 ∈ ℕ0 ((2↑𝑧) ∥ 𝑎 ∧ ¬ (2↑(𝑧 + 1)) ∥ 𝑎))
17		riotacl 5893	. . . . . . . 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 10646	. . . . . . 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 9313	. . . . . 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 12351	. . . . 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 6294	. 2 ⊢ (⊤ → 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ)
31	30	mptru 1373	1 ⊢ 𝐹:(𝐽 × ℕ0)–1-1-onto→ℕ

Syntax hints:  ¬ wn 3   ∧ wa 104   ↔ wb 105   = wceq 1364  ⊤wtru 1365   ∈ wcel 2167  ∃!wreu 2477  {crab 2479   class class class wbr 4034   × cxp 4662  –1-1-onto→wf1o 5258  ℩crio 5877  (class class class)co 5923   ∈ cmpo 5925  ℂcc 7879  ℝcr 7880  1c1 7882   + caddc 7884   · cmul 7886   / cdiv 8701  ℕcn 8992  2c2 9043  ℕ₀cn0 9251  ↑cexp 10632   ∥ cdvds 11954

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 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-coll 4149  ax-sep 4152  ax-nul 4160  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574  ax-iinf 4625  ax-cnex 7972  ax-resscn 7973  ax-1cn 7974  ax-1re 7975  ax-icn 7976  ax-addcl 7977  ax-addrcl 7978  ax-mulcl 7979  ax-mulrcl 7980  ax-addcom 7981  ax-mulcom 7982  ax-addass 7983  ax-mulass 7984  ax-distr 7985  ax-i2m1 7986  ax-0lt1 7987  ax-1rid 7988  ax-0id 7989  ax-rnegex 7990  ax-precex 7991  ax-cnre 7992  ax-pre-ltirr 7993  ax-pre-ltwlin 7994  ax-pre-lttrn 7995  ax-pre-apti 7996  ax-pre-ltadd 7997  ax-pre-mulgt0 7998  ax-pre-mulext 7999  ax-arch 8000

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 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rmo 2483  df-rab 2484  df-v 2765  df-sbc 2990  df-csb 3085  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-nul 3452  df-if 3563  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-int 3876  df-iun 3919  df-br 4035  df-opab 4096  df-mpt 4097  df-tr 4133  df-id 4329  df-po 4332  df-iso 4333  df-iord 4402  df-on 4404  df-ilim 4405  df-suc 4407  df-iom 4628  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-rn 4675  df-res 4676  df-ima 4677  df-iota 5220  df-fun 5261  df-fn 5262  df-f 5263  df-f1 5264  df-fo 5265  df-f1o 5266  df-fv 5267  df-riota 5878  df-ov 5926  df-oprab 5927  df-mpo 5928  df-1st 6199  df-2nd 6200  df-recs 6364  df-frec 6450  df-pnf 8065  df-mnf 8066  df-xr 8067  df-ltxr 8068  df-le 8069  df-sub 8201  df-neg 8202  df-reap 8604  df-ap 8611  df-div 8702  df-inn 8993  df-2 9051  df-n0 9252  df-z 9329  df-uz 9604  df-q 9696  df-rp 9731  df-fz 10086  df-fl 10362  df-mod 10417  df-seqfrec 10542  df-exp 10633  df-dvds 11955

This theorem is referenced by:  sqpweven  12353  2sqpwodd  12354  xpnnen  12621