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Mirrors > Home > ILE Home > Th. List > pm4.43 | Unicode version |
Description: Theorem *4.43 of [WhiteheadRussell] p. 119. (Contributed by NM, 3-Jan-2005.) (Proof shortened by Wolf Lammen, 26-Nov-2012.) |
Ref | Expression |
---|---|
pm4.43 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | pm3.24 693 |
. . 3
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2 | 1 | biorfi 746 |
. 2
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3 | ordi 816 |
. 2
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4 | 2, 3 | bitri 184 |
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-in1 614 ax-in2 615 ax-io 709 |
This theorem depends on definitions: df-bi 117 |
This theorem is referenced by: (None) |
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