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Theorem elelsuc 6393
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 6388 . 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 6320
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 3432  df-un 3895  df-sn 4569  df-suc 6324
This theorem is referenced by:  suctr  6406  pssnn  9097  ttrcltr  9631  ttrclss  9635  ttrclselem2  9641  pwsdompw  10119  fin1a2lem4  10319  grur1a  10736  bnj570  35066  fineqvnttrclselem3  35286  satom  35557  satfv0  35559  satfvsuc  35562  satf00  35575  satf0suc  35577  sat1el2xp  35580  fmla  35582  fmla0  35583  fmlasuc0  35585  satfdmfmla  35601  finxpsuclem  37730
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