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Theorem eldifn 3330
Description: Implication of membership in a class difference. (Contributed by NM, 3-May-1994.)
Assertion
Ref Expression
eldifn (𝐴 ∈ (𝐵𝐶) → ¬ 𝐴𝐶)

Proof of Theorem eldifn
StepHypRef Expression
1 eldif 3209 . 2 (𝐴 ∈ (𝐵𝐶) ↔ (𝐴𝐵 ∧ ¬ 𝐴𝐶))
21simprbi 275 1 (𝐴 ∈ (𝐵𝐶) → ¬ 𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  ¬ wn 3  wi 4  wcel 2202  cdif 3197
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-in1 619  ax-in2 620  ax-io 716  ax-5 1495  ax-7 1496  ax-gen 1497  ax-ie1 1541  ax-ie2 1542  ax-8 1552  ax-10 1553  ax-11 1554  ax-i12 1555  ax-bndl 1557  ax-4 1558  ax-17 1574  ax-i9 1578  ax-ial 1582  ax-i5r 1583  ax-ext 2213
This theorem depends on definitions:  df-bi 117  df-tru 1400  df-nf 1509  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2363  df-v 2804  df-dif 3202
This theorem is referenced by:  elndif  3331  unssin  3446  inssun  3447  noel  3498  disjel  3549  undifexmid  4283  exmidundif  4296  exmidundifim  4297  exmid1stab  4298  phpm  7051  undifdcss  7114  fsum3cvg  11938  summodclem2a  11941  fisumss  11952  isumss2  11953  binomlem  12043  fproddccvg  12132  prodmodclem2a  12136  fprodssdc  12150  fprodsplitdc  12156  ply1termlem  15465  plyaddlem1  15470  plymullem1  15471  plycoeid3  15480  dvply1  15488
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