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Theorem opelres 4948
Description: Ordered pair membership in a restriction. Exercise 13 of [TakeutiZaring] p. 25. (Contributed by NM, 13-Nov-1995.)
Hypothesis
Ref Expression
opelres.1 𝐵 ∈ V
Assertion
Ref Expression
opelres (⟨𝐴, 𝐵⟩ ∈ (𝐶𝐷) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶𝐴𝐷))

Proof of Theorem opelres
StepHypRef Expression
1 df-res 4672 . . 3 (𝐶𝐷) = (𝐶 ∩ (𝐷 × V))
21eleq2i 2260 . 2 (⟨𝐴, 𝐵⟩ ∈ (𝐶𝐷) ↔ ⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)))
3 elin 3343 . 2 (⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐷 × V)))
4 opelres.1 . . . 4 𝐵 ∈ V
5 opelxp 4690 . . . 4 (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ (𝐴𝐷𝐵 ∈ V))
64, 5mpbiran2 943 . . 3 (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ 𝐴𝐷)
76anbi2i 457 . 2 ((⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐷 × V)) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶𝐴𝐷))
82, 3, 73bitri 206 1 (⟨𝐴, 𝐵⟩ ∈ (𝐶𝐷) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶𝐴𝐷))
Colors of variables: wff set class
Syntax hints:  wa 104  wb 105  wcel 2164  Vcvv 2760  cin 3153  cop 3622   × cxp 4658  cres 4662
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-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-14 2167  ax-ext 2175  ax-sep 4148  ax-pow 4204  ax-pr 4239
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-nf 1472  df-sb 1774  df-clab 2180  df-cleq 2186  df-clel 2189  df-nfc 2325  df-ral 2477  df-rex 2478  df-v 2762  df-un 3158  df-in 3160  df-ss 3167  df-pw 3604  df-sn 3625  df-pr 3626  df-op 3628  df-opab 4092  df-xp 4666  df-res 4672
This theorem is referenced by:  brres  4949  opelresg  4950  opres  4952  dmres  4964  elres  4979  relssres  4981  resiexg  4988  iss  4989  restidsing  4999  asymref  5052  ssrnres  5109  cnvresima  5156  ressn  5207  funssres  5297  fcnvres  5438
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