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Theorem opkelopkab 4247
Description: Kuratowski ordered pair membership in an abstraction of Kuratowski ordered pairs. (Contributed by SF, 12-Jan-2015.)
Hypotheses
Ref Expression
opkelopkab.1 ⊢ A = {x ∣ ∃y∃z(x = ⟪y, z⟫ ∧ φ)}
opkelopkab.2 ⊢ (y = B → (φ ↔ ψ))
opkelopkab.3 ⊢ (z = C → (ψ ↔ χ))
opkelopkab.4 ⊢ B ∈ V
opkelopkab.5 ⊢ C ∈ V
Assertion
Ref Expression
opkelopkab ⊢ (⟪B, C⟫ ∈ A ↔ χ)
Distinct variable groups:   y,A,z   x,B,y,z   x,C,y,z   χ,z   φ,x   ψ,y   x,y,z
Allowed substitution hints:   φ(y, z)   ψ(x, z)   χ(x, y)   A(x)

Proof of Theorem opkelopkab
StepHypRef Expression
1 opkelopkab.4 . 2 ⊢ B ∈ V
2 opkelopkab.5 . 2 ⊢ C ∈ V
3 opkelopkab.1 . . 3 ⊢ A = {x ∣ ∃y∃z(x = ⟪y, z⟫ ∧ φ)}
4 opkelopkab.2 . . 3 ⊢ (y = B → (φ ↔ ψ))
5 opkelopkab.3 . . 3 ⊢ (z = C → (ψ ↔ χ))
63, 4, 5opkelopkabg 4246 . 2 ⊢ ((B ∈ V ∧ C ∈ V) → (⟪B, C⟫ ∈ A ↔ χ))
71, 2, 6mp2an 653 1 ⊢ (⟪B, C⟫ ∈ A ↔ χ)
Colors of variables:    wff setvar class
This proof depends on syntax axioms:   → wi 4   ↔ wb 176   ∧ wa 358  ∃wex 1541   = wceq 1642   ∈ wcel 1710  {cab 2339  Vcvv 2860  ⟪copk 4058
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-7 1734  ax-11 1746  ax-12 1925  ax-ext 2334  ax-nin 4079  ax-sn 4088
This proof depends on definitions:  df-bi 177  df-or 359  df-an 360  df-3an 936  df-nan 1288  df-tru 1319  df-ex 1542  df-nf 1545  df-sb 1649  df-clab 2340  df-cleq 2346  df-clel 2349  df-nfc 2479  df-ne 2519  df-v 2862  df-nin 3212  df-compl 3213  df-in 3214  df-un 3215  df-dif 3216  df-ss 3260  df-nul 3552  df-sn 3742  df-pr 3743  df-opk 4059
This theorem is used by:  sikss1c1c  4268  dfima2  4746  dfco1  4749  dfsi2  4752
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