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Theorem elelsuc 6400
Description: Membership in a successor. (Contributed by NM, 20-Jun-1998.)
Assertion
Ref Expression
elelsuc (𝐴𝐵𝐴 ∈ suc 𝐵)

Proof of Theorem elelsuc
StepHypRef Expression
1 orc 868 . 2 (𝐴𝐵 → (𝐴𝐵𝐴 = 𝐵))
2 elsucg 6395 . 2 (𝐴𝐵 → (𝐴 ∈ suc 𝐵 ↔ (𝐴𝐵𝐴 = 𝐵)))
31, 2mpbird 257 1 (𝐴𝐵𝐴 ∈ suc 𝐵)
Colors of variables: wff setvar class
Syntax hints:  wi 4  wo 848   = wceq 1542  wcel 2114  suc csuc 6327
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1797  ax-4 1811  ax-5 1912  ax-6 1969  ax-7 2010  ax-8 2116  ax-9 2124  ax-ext 2709
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 849  df-tru 1545  df-ex 1782  df-sb 2069  df-clab 2716  df-cleq 2729  df-clel 2812  df-v 3444  df-un 3908  df-sn 4583  df-suc 6331
This theorem is referenced by:  suctr  6413  pssnn  9105  ttrcltr  9637  ttrclss  9641  ttrclselem2  9647  pwsdompw  10125  fin1a2lem4  10325  grur1a  10742  bnj570  35081  fineqvnttrclselem3  35301  satom  35572  satfv0  35574  satfvsuc  35577  satf00  35590  satf0suc  35592  sat1el2xp  35595  fmla  35597  fmla0  35598  fmlasuc0  35600  satfdmfmla  35616  finxpsuclem  37652
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