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Theorem elelsuc 6392
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 6387 . 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 6319
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 2708
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 2715  df-cleq 2728  df-clel 2811  df-v 3442  df-un 3906  df-sn 4581  df-suc 6323
This theorem is referenced by:  suctr  6405  pssnn  9093  ttrcltr  9625  ttrclss  9629  ttrclselem2  9635  pwsdompw  10113  fin1a2lem4  10313  grur1a  10730  bnj570  35061  fineqvnttrclselem3  35279  satom  35550  satfv0  35552  satfvsuc  35555  satf00  35568  satf0suc  35570  sat1el2xp  35573  fmla  35575  fmla0  35576  fmlasuc0  35578  satfdmfmla  35594  finxpsuclem  37602
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