Theorem opelres 5063

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⟩ ∈ (𝐶 ↾ 𝐷) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ 𝐴 ∈ 𝐷))

Proof of Theorem opelres

Step	Hyp	Ref	Expression
1		df-res 4781	. . 3 ⊢ (𝐶 ↾ 𝐷) = (𝐶 ∩ (𝐷 × V))
2	1	eleq2i 2305	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 ↾ 𝐷) ↔ ⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)))
3		elin 3412	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐷 × V)))
4		opelres.1	. . . 4 ⊢ 𝐵 ∈ V
5		opelxp 4799	. . . 4 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ (𝐴 ∈ 𝐷 ∧ 𝐵 ∈ V))
6	4, 5	mpbiran2 954	. . 3 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ 𝐴 ∈ 𝐷)
7	6	anbi2i 461	. 2 ⊢ ((⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐷 × V)) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ 𝐴 ∈ 𝐷))
8	2, 3, 7	3bitri 206	1 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 ↾ 𝐷) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ 𝐴 ∈ 𝐷))

Syntax hints:   ∧ wa 104   ↔ wb 105   ∈ wcel 2209  Vcvv 2821   ∩ cin 3219  ⟨cop 3708   × cxp 4767   ↾ cres 4771

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 721  ax-5 1500  ax-7 1501  ax-gen 1502  ax-ie1 1546  ax-ie2 1547  ax-8 1557  ax-10 1558  ax-11 1559  ax-i12 1560  ax-bndl 1562  ax-4 1563  ax-17 1579  ax-i9 1583  ax-ial 1587  ax-i5r 1588  ax-14 2212  ax-ext 2220  ax-sep 4244  ax-pow 4306  ax-pr 4341

This theorem depends on definitions:  df-bi 117  df-3an 1011  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-ral 2533  df-rex 2534  df-v 2823  df-un 3224  df-in 3226  df-ss 3233  df-pw 3687  df-sn 3711  df-pr 3712  df-op 3714  df-opab 4188  df-xp 4775  df-res 4781

This theorem is referenced by:  brres  5064  opelresg  5065  opres  5067  dmres  5079  elres  5094  relssres  5096  resiexg  5103  iss  5104  restidsing  5114  asymref  5168  ssrnres  5225  cnvresima  5272  ressn  5323  funssres  5415  fcnvres  5570