Theorem 19.21bbi 1870

Description: Inference removing double quantifier. Version of 19.21bi 1869 with two quanditiers. (Contributed by NM, 20-Apr-1994.)

Hypothesis

Ref	Expression
19.21bbi.1

Assertion

Ref	Expression
19.21bbi

Proof of Theorem 19.21bbi

Step	Hyp	Ref	Expression
1		19.21bbi.1	. . 3
2	1	19.21bi 1869	. 2
3	2	19.21bi 1869	1

Syntax hints:  ->wi 4  A.wal 1393

This theorem is referenced by:  2mo  2373  2moOLD  2374  pocl  4812  funun  5635  fununi  5659  pm14.24  31339

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-12 1854

This theorem depends on definitions:  df-bi 185  df-ex 1613