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Theorem inex1g 4271
Description: Closed-form, generalized Separation Scheme. (Contributed by NM, 7-Apr-1995.)
Assertion
Ref Expression
inex1g (𝐴 ∈ 𝑉 → (𝐴 ∩ 𝐵) ∈ V)

Proof of Theorem inex1g
Dummy variable 𝑥 is distinct from all other variables.
StepHypRef Expression
1 ineq1 3425 . . 3 (𝑥 = 𝐴 → (𝑥 ∩ 𝐵) = (𝐴 ∩ 𝐵))
21eleq1d 2307 . 2 (𝑥 = 𝐴 → ((𝑥 ∩ 𝐵) ∈ V ↔ (𝐴 ∩ 𝐵) ∈ V))
3 vex 2824 . . 3 𝑥 ∈ V
43inex1 4269 . 2 (𝑥 ∩ 𝐵) ∈ V
52, 4vtoclg 2883 1 (𝐴 ∈ 𝑉 → (𝐴 ∩ 𝐵) ∈ V)
Colors of variables:    wff set class
This proof depends on syntax axioms:   → wi 4   = wceq 1402   ∈ wcel 2209  Vcvv 2821   ∩ cin 3219
This proof depends on 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-ext 2220  ax-sep 4251
This proof depends on definitions:  df-bi 117  df-tru 1405  df-nf 1514  df-sb 1816  df-clab 2225  df-cleq 2231  df-clel 2234  df-nfc 2381  df-v 2823  df-in 3226
This theorem is used by:  onin  4533  dmresexg  5088  funimaexg  5468  ofovex  6311  offval  6314  offval3  6371  ssenen  7158  hashfibclem  11303  ressvalsets  13475  ressex  13476  ressbasd  13479  resseqnbasd  13485  ressinbasd  13486  ressressg  13487  qusin  13705  mgpress  14336  isunitd  14521  isrhm  14573  rhmfn  14587  rhmval  14588  2idlval  14947  2idlvalg  14948  eltg  15295  eltg3  15300  ntrval  15353  restco  15417  wlk1walkdom  16822
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