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Mirrors > Home > ILE Home > Th. List > dedlem0a | Unicode version |
Description: Alternate version of dedlema 876. (Contributed by NM, 2-Apr-1994.) (Proof shortened by Andrew Salmon, 7-May-2011.) (Proof shortened by Wolf Lammen, 4-Dec-2012.) |
Ref | Expression |
---|---|
dedlem0a |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | iba 284 |
. 2
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2 | ax-1 5 |
. . 3
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3 | biimt 230 |
. . 3
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4 | 2, 3 | syl 14 |
. 2
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5 | 1, 4 | bitrd 177 |
1
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Colors of variables: wff set class |
Syntax hints: ![]() ![]() ![]() |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 99 ax-ia2 100 ax-ia3 101 |
This theorem depends on definitions: df-bi 110 |
This theorem is referenced by: (None) |
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