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Theorem elelsuc 6390
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 867 . 2 (𝐴𝐵 → (𝐴𝐵𝐴 = 𝐵))
2 elsucg 6385 . 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 847   = wceq 1541  wcel 2113  suc csuc 6317
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1796  ax-4 1810  ax-5 1911  ax-6 1968  ax-7 2009  ax-8 2115  ax-9 2123  ax-ext 2706
This theorem depends on definitions:  df-bi 207  df-an 396  df-or 848  df-tru 1544  df-ex 1781  df-sb 2068  df-clab 2713  df-cleq 2726  df-clel 2809  df-v 3440  df-un 3904  df-sn 4579  df-suc 6321
This theorem is referenced by:  suctr  6403  pssnn  9091  ttrcltr  9623  ttrclss  9627  ttrclselem2  9633  pwsdompw  10111  fin1a2lem4  10311  grur1a  10728  bnj570  35010  fineqvnttrclselem3  35228  satom  35499  satfv0  35501  satfvsuc  35504  satf00  35517  satf0suc  35519  sat1el2xp  35522  fmla  35524  fmla0  35525  fmlasuc0  35527  satfdmfmla  35543  finxpsuclem  37541
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