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Theorem elind 3414
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 3412 . 2 (𝑋 ∈ (𝐴𝐵) ↔ (𝑋𝐴𝑋𝐵))
41, 2, 3sylanbrc 421 1 (𝜑𝑋 ∈ (𝐴𝐵))
Colors of variables:    wff set class
This proof depends on syntax axioms:  wi 4  wcel 2209  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
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:  fnfvimad  5954  elfir  7307  infpwfidom  7550  hashfibclem  11282  ballotfilem2  13228  nninfdclemcl  13339  nninfdclemp1  13341  strslfv2d  13395  bassetsnn  13409  insubm  13792  2idl0  14849  2idl1  14850  aspval  15015  asplss  15016  aspsubrg  15018  baspartn  15151  bastg  15162  isopn3  15226  restbasg  15269  lmss  15347  metrest  15607  tgioo  15655  dvmulxxbr  15803  elply2  15836  pilem3  15884  2sqlem7  16240
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