Theorem rpnnen1OLD 11863

Description: One half of rpnnen 15000, where we show an injection from the real numbers to sequences of rational numbers. Specifically, we map a real number 𝑥 to the sequence (𝐹‘𝑥):ℕ⟶ℚ such that ((𝐹‘𝑥)‘𝑘) is the largest rational number with denominator 𝑘 that is strictly less than 𝑥. In this manner, we get a monotonically increasing sequence that converges to 𝑥, and since each sequence converges to a unique real number, this mapping from reals to sequences of rational numbers is injective. (Contributed by Mario Carneiro, 13-May-2013.) (Revised by Mario Carneiro, 16-Jun-2013.) Obsolete version of rpnnen1 11858 as of 13-Aug-2021. (New usage is discouraged.) (Proof modification is discouraged.)

Hypotheses

Ref	Expression
rpnnen1.1OLD	⊢ 𝑇 = {𝑛 ∈ ℤ ∣ (𝑛 / 𝑘) < 𝑥}
rpnnen1.2OLD	⊢ 𝐹 = (𝑥 ∈ ℝ ↦ (𝑘 ∈ ℕ ↦ (sup(𝑇, ℝ, < ) / 𝑘)))

Assertion

Ref	Expression
rpnnen1OLD	⊢ ℝ ≼ (ℚ ↑𝑚 ℕ)

Distinct variable groups:   𝑘,𝐹,𝑛,𝑥   𝑇,𝑛

Allowed substitution hints:   𝑇(𝑥,𝑘)

Proof of Theorem rpnnen1OLD

Dummy variable 𝑦 is distinct from all other variables.

Step	Hyp	Ref	Expression
1		ovex 6718	. 2 ⊢ (ℚ ↑𝑚 ℕ) ∈ V
2		rpnnen1.1OLD	. . . 4 ⊢ 𝑇 = {𝑛 ∈ ℤ ∣ (𝑛 / 𝑘) < 𝑥}
3		rpnnen1.2OLD	. . . 4 ⊢ 𝐹 = (𝑥 ∈ ℝ ↦ (𝑘 ∈ ℕ ↦ (sup(𝑇, ℝ, < ) / 𝑘)))
4	2, 3	rpnnen1lem1OLD 11859	. . 3 ⊢ (𝑥 ∈ ℝ → (𝐹‘𝑥) ∈ (ℚ ↑𝑚 ℕ))
5		rneq 5383	. . . . . 6 ⊢ ((𝐹‘𝑥) = (𝐹‘𝑦) → ran (𝐹‘𝑥) = ran (𝐹‘𝑦))
6	5	supeq1d 8393	. . . . 5 ⊢ ((𝐹‘𝑥) = (𝐹‘𝑦) → sup(ran (𝐹‘𝑥), ℝ, < ) = sup(ran (𝐹‘𝑦), ℝ, < ))
7	2, 3	rpnnen1lem5OLD 11862	. . . . . 6 ⊢ (𝑥 ∈ ℝ → sup(ran (𝐹‘𝑥), ℝ, < ) = 𝑥)
8		fveq2 6229	. . . . . . . . . 10 ⊢ (𝑥 = 𝑦 → (𝐹‘𝑥) = (𝐹‘𝑦))
9	8	rneqd 5385	. . . . . . . . 9 ⊢ (𝑥 = 𝑦 → ran (𝐹‘𝑥) = ran (𝐹‘𝑦))
10	9	supeq1d 8393	. . . . . . . 8 ⊢ (𝑥 = 𝑦 → sup(ran (𝐹‘𝑥), ℝ, < ) = sup(ran (𝐹‘𝑦), ℝ, < ))
11		id 22	. . . . . . . 8 ⊢ (𝑥 = 𝑦 → 𝑥 = 𝑦)
12	10, 11	eqeq12d 2666	. . . . . . 7 ⊢ (𝑥 = 𝑦 → (sup(ran (𝐹‘𝑥), ℝ, < ) = 𝑥 ↔ sup(ran (𝐹‘𝑦), ℝ, < ) = 𝑦))
13	12, 7	vtoclga 3303	. . . . . 6 ⊢ (𝑦 ∈ ℝ → sup(ran (𝐹‘𝑦), ℝ, < ) = 𝑦)
14	7, 13	eqeqan12d 2667	. . . . 5 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → (sup(ran (𝐹‘𝑥), ℝ, < ) = sup(ran (𝐹‘𝑦), ℝ, < ) ↔ 𝑥 = 𝑦))
15	6, 14	syl5ib 234	. . . 4 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((𝐹‘𝑥) = (𝐹‘𝑦) → 𝑥 = 𝑦))
16	15, 8	impbid1 215	. . 3 ⊢ ((𝑥 ∈ ℝ ∧ 𝑦 ∈ ℝ) → ((𝐹‘𝑥) = (𝐹‘𝑦) ↔ 𝑥 = 𝑦))
17	4, 16	dom2 8040	. 2 ⊢ ((ℚ ↑𝑚 ℕ) ∈ V → ℝ ≼ (ℚ ↑𝑚 ℕ))
18	1, 17	ax-mp 5	1 ⊢ ℝ ≼ (ℚ ↑𝑚 ℕ)

Syntax hints:   ∧ wa 383   = wceq 1523   ∈ wcel 2030  {crab 2945  Vcvv 3231   class class class wbr 4685   ↦ cmpt 4762  ran crn 5144  ‘cfv 5926  (class class class)co 6690   ↑_𝑚 cmap 7899   ≼ cdom 7995  supcsup 8387  ℝcr 9973   < clt 10112   / cdiv 10722  ℕcn 11058  ℤcz 11415  ℚcq 11826

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1762  ax-4 1777  ax-5 1879  ax-6 1945  ax-7 1981  ax-8 2032  ax-9 2039  ax-10 2059  ax-11 2074  ax-12 2087  ax-13 2282  ax-ext 2631  ax-rep 4804  ax-sep 4814  ax-nul 4822  ax-pow 4873  ax-pr 4936  ax-un 6991  ax-cnex 10030  ax-resscn 10031  ax-1cn 10032  ax-icn 10033  ax-addcl 10034  ax-addrcl 10035  ax-mulcl 10036  ax-mulrcl 10037  ax-mulcom 10038  ax-addass 10039  ax-mulass 10040  ax-distr 10041  ax-i2m1 10042  ax-1ne0 10043  ax-1rid 10044  ax-rnegex 10045  ax-rrecex 10046  ax-cnre 10047  ax-pre-lttri 10048  ax-pre-lttrn 10049  ax-pre-ltadd 10050  ax-pre-mulgt0 10051  ax-pre-sup 10052

This theorem depends on definitions:  df-bi 197  df-or 384  df-an 385  df-3or 1055  df-3an 1056  df-tru 1526  df-ex 1745  df-nf 1750  df-sb 1938  df-eu 2502  df-mo 2503  df-clab 2638  df-cleq 2644  df-clel 2647  df-nfc 2782  df-ne 2824  df-nel 2927  df-ral 2946  df-rex 2947  df-reu 2948  df-rmo 2949  df-rab 2950  df-v 3233  df-sbc 3469  df-csb 3567  df-dif 3610  df-un 3612  df-in 3614  df-ss 3621  df-pss 3623  df-nul 3949  df-if 4120  df-pw 4193  df-sn 4211  df-pr 4213  df-tp 4215  df-op 4217  df-uni 4469  df-iun 4554  df-br 4686  df-opab 4746  df-mpt 4763  df-tr 4786  df-id 5053  df-eprel 5058  df-po 5064  df-so 5065  df-fr 5102  df-we 5104  df-xp 5149  df-rel 5150  df-cnv 5151  df-co 5152  df-dm 5153  df-rn 5154  df-res 5155  df-ima 5156  df-pred 5718  df-ord 5764  df-on 5765  df-lim 5766  df-suc 5767  df-iota 5889  df-fun 5928  df-fn 5929  df-f 5930  df-f1 5931  df-fo 5932  df-f1o 5933  df-fv 5934  df-riota 6651  df-ov 6693  df-oprab 6694  df-mpt2 6695  df-om 7108  df-1st 7210  df-2nd 7211  df-wrecs 7452  df-recs 7513  df-rdg 7551  df-er 7787  df-map 7901  df-en 7998  df-dom 7999  df-sdom 8000  df-sup 8389  df-pnf 10114  df-mnf 10115  df-xr 10116  df-ltxr 10117  df-le 10118  df-sub 10306  df-neg 10307  df-div 10723  df-nn 11059  df-n0 11331  df-z 11416  df-q 11827

This theorem is referenced by: (None)