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Theorem eldifsni 3824
Description: Membership in a set with an element removed. (Contributed by NM, 10-Mar-2015.)
Assertion
Ref Expression
eldifsni (𝐴 ∈ (𝐵 ∖ {𝐶}) → 𝐴𝐶)

Proof of Theorem eldifsni
StepHypRef Expression
1 eldifsn 3822 . 2 (𝐴 ∈ (𝐵 ∖ {𝐶}) ↔ (𝐴𝐵𝐴𝐶))
21simprbi 275 1 (𝐴 ∈ (𝐵 ∖ {𝐶}) → 𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2205  wne 2414  cdif 3210  {csn 3691
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 717  ax-5 1496  ax-7 1497  ax-gen 1498  ax-ie1 1542  ax-ie2 1543  ax-8 1553  ax-10 1554  ax-11 1555  ax-i12 1556  ax-bndl 1558  ax-4 1559  ax-17 1575  ax-i9 1579  ax-ial 1583  ax-i5r 1584  ax-ext 2216
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1812  df-clab 2221  df-cleq 2227  df-clel 2230  df-nfc 2375  df-ne 2415  df-v 2817  df-dif 3215  df-sn 3697
This theorem is referenced by:  neldifsn  3825  suppssov1  6265  suppssfvg  6465  elfi2  7261  fiuni  7267  fifo  7269  en2other2  7501  oddprm  12965  ringelnzr  14354  lgslem1  15922  lgseisenlem2  15993  lgseisenlem4  15995  lgseisen  15996  lgsquadlem1  15999  lgsquad2  16005  m1lgs  16007
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