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Theorem intexrab 5268
Description: The intersection of a nonempty restricted class abstraction exists. (Contributed by NM, 21-Oct-2003.)
Assertion
Ref Expression
intexrab (∃𝑥𝐴 𝜑 {𝑥𝐴𝜑} ∈ V)

Proof of Theorem intexrab
StepHypRef Expression
1 intexab 5267 . 2 (∃𝑥(𝑥𝐴𝜑) ↔ {𝑥 ∣ (𝑥𝐴𝜑)} ∈ V)
2 df-rex 3072 . 2 (∃𝑥𝐴 𝜑 ↔ ∃𝑥(𝑥𝐴𝜑))
3 df-rab 3075 . . . 4 {𝑥𝐴𝜑} = {𝑥 ∣ (𝑥𝐴𝜑)}
43inteqi 4889 . . 3 {𝑥𝐴𝜑} = {𝑥 ∣ (𝑥𝐴𝜑)}
54eleq1i 2831 . 2 ( {𝑥𝐴𝜑} ∈ V ↔ {𝑥 ∣ (𝑥𝐴𝜑)} ∈ V)
61, 2, 53bitr4i 303 1 (∃𝑥𝐴 𝜑 {𝑥𝐴𝜑} ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wb 205  wa 396  wex 1786  wcel 2110  {cab 2717  wrex 3067  {crab 3070  Vcvv 3431   cint 4885
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1802  ax-4 1816  ax-5 1917  ax-6 1975  ax-7 2015  ax-8 2112  ax-9 2120  ax-10 2141  ax-11 2158  ax-12 2175  ax-ext 2711  ax-sep 5227
This theorem depends on definitions:  df-bi 206  df-an 397  df-or 845  df-tru 1545  df-fal 1555  df-ex 1787  df-nf 1791  df-sb 2072  df-clab 2718  df-cleq 2732  df-clel 2818  df-ne 2946  df-ral 3071  df-rex 3072  df-rab 3075  df-v 3433  df-dif 3895  df-in 3899  df-ss 3909  df-nul 4263  df-int 4886
This theorem is referenced by:  onintrab2  7638  rankf  9545  rankvalb  9548  cardf2  9694  tskmval  10588  lspval  20227  aspval  21067  clsval  22178  spanval  29683  rgspnval  40982
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