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Theorem albi 1564
Description: Theorem 19.15 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.)
Assertion
Ref Expression
albi

Proof of Theorem albi
StepHypRef Expression
1 bi1 178 . . 3
21al2imi 1561 . 2
3 bi2 189 . . 3
43al2imi 1561 . 2
52, 4impbid 183 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wb 176  wal 1540
This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1546  ax-5 1557
This theorem depends on definitions:  df-bi 177
This theorem is referenced by:  albii  1566  albidh  1590  19.16  1860  19.17  1861  intmin4  3955  dfiin2g  4000
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