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Theorem elind 3320
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 3318 . 2 (𝑋 ∈ (𝐴𝐵) ↔ (𝑋𝐴𝑋𝐵))
41, 2, 3sylanbrc 417 1 (𝜑𝑋 ∈ (𝐴𝐵))
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2148  cin 3128
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 2739  df-in 3135
This theorem is referenced by:  elfir  6971  infpwfidom  7196  nninfdclemcl  12448  nninfdclemp1  12450  strslfv2d  12504  insubm  12871  baspartn  13486  bastg  13497  isopn3  13561  restbasg  13604  lmss  13682  metrest  13942  tgioo  13982  dvmulxxbr  14102  pilem3  14140  2sqlem7  14404
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