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Theorem elind 3389
Description: Deduce membership in an intersection of two classes. (Contributed by Jonathan Ben-Naim, 3-Jun-2011.)
Hypotheses
Ref Expression
elind.1 (𝜑𝑋𝐴)
elind.2 (𝜑𝑋𝐵)
Assertion
Ref Expression
elind (𝜑𝑋 ∈ (𝐴𝐵))

Proof of Theorem elind
StepHypRef Expression
1 elind.1 . 2 (𝜑𝑋𝐴)
2 elind.2 . 2 (𝜑𝑋𝐵)
3 elin 3387 . 2 (𝑋 ∈ (𝐴𝐵) ↔ (𝑋𝐴𝑋𝐵))
41, 2, 3sylanbrc 417 1 (𝜑𝑋 ∈ (𝐴𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2200  cin 3196
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 714  ax-5 1493  ax-7 1494  ax-gen 1495  ax-ie1 1539  ax-ie2 1540  ax-8 1550  ax-10 1551  ax-11 1552  ax-i12 1553  ax-bndl 1555  ax-4 1556  ax-17 1572  ax-i9 1576  ax-ial 1580  ax-i5r 1581  ax-ext 2211
This theorem depends on definitions:  df-bi 117  df-tru 1398  df-nf 1507  df-sb 1809  df-clab 2216  df-cleq 2222  df-clel 2225  df-nfc 2361  df-v 2801  df-in 3203
This theorem is referenced by:  fnfvimad  5879  elfir  7151  infpwfidom  7387  nninfdclemcl  13034  nninfdclemp1  13036  strslfv2d  13090  bassetsnn  13104  insubm  13533  2idl0  14491  2idl1  14492  baspartn  14739  bastg  14750  isopn3  14814  restbasg  14857  lmss  14935  metrest  15195  tgioo  15243  dvmulxxbr  15391  elply2  15424  pilem3  15472  2sqlem7  15815
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