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Theorem elinel1 3415
Description: Membership in an intersection implies membership in the first set. (Contributed by Glauco Siliprandi, 11-Dec-2019.)
Assertion
Ref Expression
elinel1 (𝐴 ∈ (𝐵 ∩ 𝐶) → 𝐴 ∈ 𝐵)

Proof of Theorem elinel1
StepHypRef Expression
1 elin 3412 . 2 (𝐴 ∈ (𝐵 ∩ 𝐶) ↔ (𝐴 ∈ 𝐵 ∧ 𝐴 ∈ 𝐶))
21simplbi 274 1 (𝐴 ∈ (𝐵 ∩ 𝐶) → 𝐴 ∈ 𝐵)
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:  elin1d  3418  ressuppss  6494  fival  7304  fi0  7309  hashfibclem  11298  ballotfilem2  13280  ballotfilemfp1  13283  resscntz  14160  2idlval  14923  blbas  15625  blres  15626  pilem3  15976  ppiprm  16220  chtprm  16222  prmorcht  16243  uhgrspansubgrlem  16683  taupi  17290
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