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Theorem 0ellim 4543
Description: A limit ordinal contains the empty set. (Contributed by NM, 15-May-1994.)
Assertion
Ref Expression
0ellim  |-  ( Lim 
A  ->  (/)  e.  A
)

Proof of Theorem 0ellim
StepHypRef Expression
1 dflim2 4515 . 2  |-  ( Lim 
A  <->  ( Ord  A  /\  (/)  e.  A  /\  A  =  U. A ) )
21simp2bi 1044 1  |-  ( Lim 
A  ->  (/)  e.  A
)
Colors of variables:    wff set class
This proof depends on syntax axioms:    -> wi 4    = wceq 1402    e. wcel 2209   (/)c0 3520   U.cuni 3935   Ord word 4507   Lim wlim 4509
This proof depends on axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107
This proof depends on definitions:  df-bi 117  df-3an 1011  df-ilim 4514
This theorem is used by: (None)
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