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Theorem 19.23hOLD 1820
Description: Obsolete proof of 19.23h 1802 as of 1-Jan-2018. (Contributed by NM, 5-Aug-1993.) (Revised by Mario Carneiro, 24-Sep-2016.) (Proof modification is discouraged.) (New usage is discouraged.)
Hypothesis
Ref Expression
19.23hOLD.1
Assertion
Ref Expression
19.23hOLD

Proof of Theorem 19.23hOLD
StepHypRef Expression
1 exim 1575 . . 3
2 19.23hOLD.1 . . . 4
3219.9h 1780 . . 3
41, 3syl6ib 217 . 2
5 hbe1 1731 . . . 4
65, 2hbim 1817 . . 3
7 19.8a 1756 . . . 4
87imim1i 54 . . 3
96, 8alrimih 1565 . 2
104, 9impbii 180 1
Colors of variables: wff setvar class
Syntax hints:   wi 4   wb 176  wal 1540  wex 1541
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-3 8  ax-gen 1546  ax-5 1557  ax-17 1616  ax-9 1654  ax-8 1675  ax-6 1729  ax-11 1746
This theorem depends on definitions:  df-bi 177  df-ex 1542  df-nf 1545
This theorem is referenced by: (None)
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