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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
StepHypRef Expression
1 19.21bbi.1 . . 3
2119.21bi 1869 . 2
3219.21bi 1869 1
Colors of variables: wff setvar class
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
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