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Theorem ordfr 4551
Description: Epsilon is well-founded on an ordinal class. (Contributed by NM, 22-Apr-1994.)
Assertion
Ref Expression
ordfr  |-  ( Ord 
A  ->  _E  Fr  A )

Proof of Theorem ordfr
StepHypRef Expression
1 zfregfr 4550 . 2  |-  _E  Fr  A
21a1i 9 1  |-  ( Ord 
A  ->  _E  Fr  A )
Colors of variables: wff set class
Syntax hints:    -> wi 4    _E cep 4264    Fr wfr 4305   Ord word 4339
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-io 699  ax-5 1435  ax-7 1436  ax-gen 1437  ax-ie1 1481  ax-ie2 1482  ax-8 1492  ax-10 1493  ax-11 1494  ax-i12 1495  ax-bndl 1497  ax-4 1498  ax-17 1514  ax-i9 1518  ax-ial 1522  ax-i5r 1523  ax-14 2139  ax-ext 2147  ax-sep 4099  ax-pow 4152  ax-pr 4186  ax-setind 4513
This theorem depends on definitions:  df-bi 116  df-3an 970  df-tru 1346  df-nf 1449  df-sb 1751  df-eu 2017  df-mo 2018  df-clab 2152  df-cleq 2158  df-clel 2161  df-nfc 2296  df-ral 2448  df-v 2727  df-un 3119  df-in 3121  df-ss 3128  df-pw 3560  df-sn 3581  df-pr 3582  df-op 3584  df-br 3982  df-opab 4043  df-eprel 4266  df-frfor 4308  df-frind 4309
This theorem is referenced by:  ordwe  4552
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