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Theorem opelres 4889
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 4616 . . 3 (𝐶𝐷) = (𝐶 ∩ (𝐷 × V))
21eleq2i 2233 . 2 (⟨𝐴, 𝐵⟩ ∈ (𝐶𝐷) ↔ ⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)))
3 elin 3305 . 2 (⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐷 × V)))
4 opelres.1 . . . 4 𝐵 ∈ V
5 opelxp 4634 . . . 4 (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ (𝐴𝐷𝐵 ∈ V))
64, 5mpbiran2 931 . . 3 (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ 𝐴𝐷)
76anbi2i 453 . 2 ((⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐷 × V)) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶𝐴𝐷))
82, 3, 73bitri 205 1 (⟨𝐴, 𝐵⟩ ∈ (𝐶𝐷) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶𝐴𝐷))
Colors of variables: wff set class
Syntax hints:  wa 103  wb 104  wcel 2136  Vcvv 2726  cin 3115  cop 3579   × cxp 4602  cres 4606
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4100  ax-pow 4153  ax-pr 4187
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2297  df-ral 2449  df-rex 2450  df-v 2728  df-un 3120  df-in 3122  df-ss 3129  df-pw 3561  df-sn 3582  df-pr 3583  df-op 3585  df-opab 4044  df-xp 4610  df-res 4616
This theorem is referenced by:  brres  4890  opelresg  4891  opres  4893  dmres  4905  elres  4920  relssres  4922  resiexg  4929  iss  4930  asymref  4989  ssrnres  5046  cnvresima  5093  ressn  5144  funssres  5230  fcnvres  5371
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