Theorem ordfr 5738

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

Step	Hyp	Ref	Expression
1		ordwe 5736	. 2 |- ( Ord A -> _E We A )
2		wefr 5104	. 2 |- ( _E We A -> _E Fr A )
3	1, 2	syl 17	1 |- ( Ord A -> _E Fr A )

Syntax hints:   -> wi 4   _E cep 5028   Fr wfr 5070   We wwe 5072   Ord word 5722

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8

This theorem depends on definitions:  df-bi 197  df-an 386  df-we 5075  df-ord 5726

This theorem is referenced by:  ordirr  5741  tz7.7  5749  onfr  5763  bnj580  30983  bnj1053  31044  bnj1071  31045