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Theorem eldifsni 3806
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 3804 . 2 (𝐴 ∈ (𝐵 ∖ {𝐶}) ↔ (𝐴𝐵𝐴𝐶))
21simprbi 275 1 (𝐴 ∈ (𝐵 ∖ {𝐶}) → 𝐴𝐶)
Colors of variables: wff set class
Syntax hints:  wi 4  wcel 2202  wne 2403  cdif 3198  {csn 3673
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 2213
This theorem depends on definitions:  df-bi 117  df-tru 1401  df-nf 1510  df-sb 1811  df-clab 2218  df-cleq 2224  df-clel 2227  df-nfc 2364  df-ne 2404  df-v 2805  df-dif 3203  df-sn 3679
This theorem is referenced by:  neldifsn  3807  suppssov1  6241  suppssfvg  6441  elfi2  7214  fiuni  7220  fifo  7222  en2other2  7450  oddprm  12893  ringelnzr  14263  lgslem1  15796  lgseisenlem2  15867  lgseisenlem4  15869  lgseisen  15870  lgsquadlem1  15873  lgsquad2  15879  m1lgs  15881
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