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Theorem 19.32 1896
 Description: Theorem 19.32 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.) (Revised by Mario Carneiro, 24-Sep-2016.)
Hypothesis
Ref Expression
19.32.1
Assertion
Ref Expression
19.32

Proof of Theorem 19.32
StepHypRef Expression
1 19.32.1 . . . 4
21nfn 1811 . . 3
3219.21 1814 . 2
4 df-or 360 . . 3
54albii 1575 . 2
6 df-or 360 . 2
73, 5, 63bitr4i 269 1
 Colors of variables: wff set class Syntax hints:   wn 3   wi 4   wb 177   wo 358  wal 1549  wnf 1553 This theorem is referenced by:  19.31  1897  2eu3  2363  axi12  2415  pm10.12  27530 This theorem was proved from axioms:  ax-1 5  ax-2 6  ax-3 7  ax-mp 8  ax-gen 1555  ax-5 1566  ax-17 1626  ax-9 1666  ax-8 1687  ax-6 1744  ax-11 1761 This theorem depends on definitions:  df-bi 178  df-or 360  df-tru 1328  df-ex 1551  df-nf 1554
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