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Mirrors > Home > NFE Home > Th. List > 19.31 | Unicode version |
Description: Theorem 19.31 of [Margaris] p. 90. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
19.31.1 |
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Ref | Expression |
---|---|
19.31 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.31.1 |
. . 3
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2 | 1 | 19.32 1875 |
. 2
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3 | orcom 376 |
. . 3
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4 | 3 | albii 1566 |
. 2
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5 | orcom 376 |
. 2
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6 | 2, 4, 5 | 3bitr4i 268 |
1
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Colors of variables: wff setvar class |
Syntax hints: ![]() ![]() ![]() ![]() |
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: 2eu3 2286 |
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