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Theorem elind 3322
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 3320 . 2 (𝑋 ∈ (𝐴𝐵) ↔ (𝑋𝐴𝑋𝐵))
41, 2, 3sylanbrc 417 1 (𝜑𝑋 ∈ (𝐴𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2148  cin 3130
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 709  ax-5 1447  ax-7 1448  ax-gen 1449  ax-ie1 1493  ax-ie2 1494  ax-8 1504  ax-10 1505  ax-11 1506  ax-i12 1507  ax-bndl 1509  ax-4 1510  ax-17 1526  ax-i9 1530  ax-ial 1534  ax-i5r 1535  ax-ext 2159
This theorem depends on definitions:  df-bi 117  df-tru 1356  df-nf 1461  df-sb 1763  df-clab 2164  df-cleq 2170  df-clel 2173  df-nfc 2308  df-v 2741  df-in 3137
This theorem is referenced by:  elfir  6974  infpwfidom  7199  nninfdclemcl  12451  nninfdclemp1  12453  strslfv2d  12507  insubm  12877  baspartn  13589  bastg  13600  isopn3  13664  restbasg  13707  lmss  13785  metrest  14045  tgioo  14085  dvmulxxbr  14205  pilem3  14243  2sqlem7  14507
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