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Theorem intexab 5303
Description: The intersection of a nonempty class abstraction exists. (Contributed by NM, 21-Oct-2003.)
Assertion
Ref Expression
intexab (∃𝑥𝜑 {𝑥𝜑} ∈ V)

Proof of Theorem intexab
StepHypRef Expression
1 abn0 4339 . 2 ({𝑥𝜑} ≠ ∅ ↔ ∃𝑥𝜑)
2 intex 5301 . 2 ({𝑥𝜑} ≠ ∅ ↔ {𝑥𝜑} ∈ V)
31, 2bitr3i 279 1 (∃𝑥𝜑 {𝑥𝜑} ∈ V)
Colors of variables: wff setvar class
Syntax hints:  wb 208  wex 1800  wcel 2143  {cab 2741  wne 2958  Vcvv 3455  c0 4286   cint 4906
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1816  ax-4 1830  ax-5 1931  ax-6 1988  ax-7 2029  ax-8 2145  ax-9 2153  ax-10 2176  ax-11 2192  ax-12 2213  ax-ext 2735  ax-sep 5247
This theorem depends on definitions:  df-bi 209  df-an 400  df-or 859  df-3an 1101  df-tru 1564  df-fal 1574  df-ex 1801  df-nf 1805  df-sb 2092  df-clab 2742  df-cleq 2755  df-clel 2838  df-ne 2959  df-ral 3078  df-rex 3088  df-rab 3416  df-v 3457  df-dif 3908  df-in 3912  df-ss 3922  df-nul 4287  df-int 4907
This theorem is referenced by:  intexrab  5304  tcmin  9692  cfval  10214  efgval  19767  tz9.1regs  35434  tz9.1ctco  36847  dfttc3gw  36888  relintabex  44162  rclexi  44196  rtrclex  44198  trclexi  44201  rtrclexi  44202  aiotaexb  47674
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