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Mirrors > Home > ILE Home > Th. List > 19.26-3an | Unicode version |
Description: Theorem 19.26 of [Margaris] p. 90 with triple conjunction. (Contributed by NM, 13-Sep-2011.) |
Ref | Expression |
---|---|
19.26-3an |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 19.26 1481 |
. . 3
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2 | 19.26 1481 |
. . . 4
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3 | 2 | anbi1i 458 |
. . 3
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4 | 1, 3 | bitri 184 |
. 2
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5 | df-3an 980 |
. . 3
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6 | 5 | albii 1470 |
. 2
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7 | df-3an 980 |
. 2
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8 | 4, 6, 7 | 3bitr4i 212 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() ![]() |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-ia1 106 ax-ia2 107 ax-ia3 108 ax-5 1447 ax-gen 1449 |
This theorem depends on definitions: df-bi 117 df-3an 980 |
This theorem is referenced by: hb3and 1490 |
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