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Mirrors > Home > ILE Home > Th. List > biimt | Unicode version |
Description: A wff is equivalent to itself with true antecedent. (Contributed by NM, 28-Jan-1996.) |
Ref | Expression |
---|---|
biimt |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1 6 |
. 2
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2 | pm2.27 40 |
. 2
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3 | 1, 2 | impbid2 142 |
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 105 ax-ia2 106 ax-ia3 107 |
This theorem depends on definitions: df-bi 116 |
This theorem is referenced by: pm5.5 241 a1bi 242 abai 550 dedlem0a 953 ceqsralt 2716 reu8 2884 csbiebt 3044 r19.3rm 3456 fncnv 5197 ovmpodxf 5904 brecop 6527 tgss2 12287 |
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