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Theorem xmeterval 22177
Description: Value of the "finitely separated" relation. (Contributed by Mario Carneiro, 24-Aug-2015.)
Hypothesis
Ref Expression
xmeter.1 = (𝐷 “ ℝ)
Assertion
Ref Expression
xmeterval (𝐷 ∈ (∞Met‘𝑋) → (𝐴 𝐵 ↔ (𝐴𝑋𝐵𝑋 ∧ (𝐴𝐷𝐵) ∈ ℝ)))

Proof of Theorem xmeterval
StepHypRef Expression
1 xmetf 22074 . . 3 (𝐷 ∈ (∞Met‘𝑋) → 𝐷:(𝑋 × 𝑋)⟶ℝ*)
2 ffn 6012 . . 3 (𝐷:(𝑋 × 𝑋)⟶ℝ*𝐷 Fn (𝑋 × 𝑋))
3 elpreima 6303 . . 3 (𝐷 Fn (𝑋 × 𝑋) → (⟨𝐴, 𝐵⟩ ∈ (𝐷 “ ℝ) ↔ (⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋) ∧ (𝐷‘⟨𝐴, 𝐵⟩) ∈ ℝ)))
41, 2, 33syl 18 . 2 (𝐷 ∈ (∞Met‘𝑋) → (⟨𝐴, 𝐵⟩ ∈ (𝐷 “ ℝ) ↔ (⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋) ∧ (𝐷‘⟨𝐴, 𝐵⟩) ∈ ℝ)))
5 xmeter.1 . . . 4 = (𝐷 “ ℝ)
65breqi 4629 . . 3 (𝐴 𝐵𝐴(𝐷 “ ℝ)𝐵)
7 df-br 4624 . . 3 (𝐴(𝐷 “ ℝ)𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ (𝐷 “ ℝ))
86, 7bitri 264 . 2 (𝐴 𝐵 ↔ ⟨𝐴, 𝐵⟩ ∈ (𝐷 “ ℝ))
9 df-3an 1038 . . 3 ((𝐴𝑋𝐵𝑋 ∧ (𝐴𝐷𝐵) ∈ ℝ) ↔ ((𝐴𝑋𝐵𝑋) ∧ (𝐴𝐷𝐵) ∈ ℝ))
10 opelxp 5116 . . . . 5 (⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋) ↔ (𝐴𝑋𝐵𝑋))
1110bicomi 214 . . . 4 ((𝐴𝑋𝐵𝑋) ↔ ⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋))
12 df-ov 6618 . . . . 5 (𝐴𝐷𝐵) = (𝐷‘⟨𝐴, 𝐵⟩)
1312eleq1i 2689 . . . 4 ((𝐴𝐷𝐵) ∈ ℝ ↔ (𝐷‘⟨𝐴, 𝐵⟩) ∈ ℝ)
1411, 13anbi12i 732 . . 3 (((𝐴𝑋𝐵𝑋) ∧ (𝐴𝐷𝐵) ∈ ℝ) ↔ (⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋) ∧ (𝐷‘⟨𝐴, 𝐵⟩) ∈ ℝ))
159, 14bitri 264 . 2 ((𝐴𝑋𝐵𝑋 ∧ (𝐴𝐷𝐵) ∈ ℝ) ↔ (⟨𝐴, 𝐵⟩ ∈ (𝑋 × 𝑋) ∧ (𝐷‘⟨𝐴, 𝐵⟩) ∈ ℝ))
164, 8, 153bitr4g 303 1 (𝐷 ∈ (∞Met‘𝑋) → (𝐴 𝐵 ↔ (𝐴𝑋𝐵𝑋 ∧ (𝐴𝐷𝐵) ∈ ℝ)))
Colors of variables: wff setvar class
Syntax hints:  wi 4  wb 196  wa 384  w3a 1036   = wceq 1480  wcel 1987  cop 4161   class class class wbr 4623   × cxp 5082  ccnv 5083  cima 5087   Fn wfn 5852  wf 5853  cfv 5857  (class class class)co 6615  cr 9895  *cxr 10033  ∞Metcxmt 19671
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1719  ax-4 1734  ax-5 1836  ax-6 1885  ax-7 1932  ax-8 1989  ax-9 1996  ax-10 2016  ax-11 2031  ax-12 2044  ax-13 2245  ax-ext 2601  ax-sep 4751  ax-nul 4759  ax-pow 4813  ax-pr 4877  ax-un 6914  ax-cnex 9952  ax-resscn 9953
This theorem depends on definitions:  df-bi 197  df-or 385  df-an 386  df-3an 1038  df-tru 1483  df-ex 1702  df-nf 1707  df-sb 1878  df-eu 2473  df-mo 2474  df-clab 2608  df-cleq 2614  df-clel 2617  df-nfc 2750  df-ne 2791  df-ral 2913  df-rex 2914  df-rab 2917  df-v 3192  df-sbc 3423  df-dif 3563  df-un 3565  df-in 3567  df-ss 3574  df-nul 3898  df-if 4065  df-pw 4138  df-sn 4156  df-pr 4158  df-op 4162  df-uni 4410  df-br 4624  df-opab 4684  df-mpt 4685  df-id 4999  df-xp 5090  df-rel 5091  df-cnv 5092  df-co 5093  df-dm 5094  df-rn 5095  df-res 5096  df-ima 5097  df-iota 5820  df-fun 5859  df-fn 5860  df-f 5861  df-fv 5865  df-ov 6618  df-oprab 6619  df-mpt2 6620  df-map 7819  df-xr 10038  df-xmet 19679
This theorem is referenced by:  xmeter  22178  xmetec  22179  xmetresbl  22182  xrsblre  22554  isbndx  33252
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