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Theorem 19.32 1875
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  F/
Assertion
Ref Expression
19.32

Proof of Theorem 19.32
StepHypRef Expression
1 19.32.1 . . . 4  F/
21nfn 1793 . . 3  F/
3219.21 1796 . 2
4 df-or 359 . . 3
54albii 1566 . 2
6 df-or 359 . 2
73, 5, 63bitr4i 268 1
Colors of variables: wff setvar class
Syntax hints:   wn 3   wi 4   wb 176   wo 357  wal 1540   F/wnf 1544
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-or 359  df-tru 1319  df-ex 1542  df-nf 1545
This theorem is referenced by:  19.31  1876  2eu3  2286  axi12  2333
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