Theorem drex2 2070

Description: Formula-building lemma for use with the Distinctor Reduction Theorem. Part of Theorem 9.4 of [Megill] p. 448 (p. 16 of preprint). (Contributed by NM, 27-Feb-2005.)

Hypothesis

Ref	Expression
dral1.1

Assertion

Ref	Expression
drex2

Proof of Theorem drex2

Step	Hyp	Ref	Expression
1		hbae 2055	. 2
2		dral1.1	. 2
3	1, 2	exbidh 1676	1

Syntax hints:  ->wi 4  <->wb 184  A.wal 1393  E.wex 1612

This theorem is referenced by:  dfid3  4801  dropab1  31356  dropab2  31357  e2ebind  33336

This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1618  ax-4 1631  ax-5 1704  ax-6 1747  ax-7 1790  ax-10 1837  ax-11 1842  ax-12 1854  ax-13 1999

This theorem depends on definitions:  df-bi 185  df-an 371  df-ex 1613  df-nf 1617