Theorem opelres 5024

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 4743	. . 3 ⊢ (𝐶 ↾ 𝐷) = (𝐶 ∩ (𝐷 × V))
2	1	eleq2i 2298	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 ↾ 𝐷) ↔ ⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)))
3		elin 3392	. 2 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐶 ∩ (𝐷 × V)) ↔ (⟨𝐴, 𝐵⟩ ∈ 𝐶 ∧ ⟨𝐴, 𝐵⟩ ∈ (𝐷 × V)))
4		opelres.1	. . . 4 ⊢ 𝐵 ∈ V
5		opelxp 4761	. . . 4 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ (𝐴 ∈ 𝐷 ∧ 𝐵 ∈ V))
6	4, 5	mpbiran2 950	. . 3 ⊢ (⟨𝐴, 𝐵⟩ ∈ (𝐷 × V) ↔ 𝐴 ∈ 𝐷)
7	6	anbi2i 457	. 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 2202  Vcvv 2803   ∩ cin 3200  ⟨cop 3676   × cxp 4729   ↾ cres 4733

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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-14 2205  ax-ext 2213  ax-sep 4212  ax-pow 4270  ax-pr 4305

This theorem depends on definitions:  df-bi 117  df-3an 1007  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ral 2516  df-rex 2517  df-v 2805  df-un 3205  df-in 3207  df-ss 3214  df-pw 3658  df-sn 3679  df-pr 3680  df-op 3682  df-opab 4156  df-xp 4737  df-res 4743

This theorem is referenced by:  brres  5025  opelresg  5026  opres  5028  dmres  5040  elres  5055  relssres  5057  resiexg  5064  iss  5065  restidsing  5075  asymref  5129  ssrnres  5186  cnvresima  5233  ressn  5284  funssres  5376  fcnvres  5528