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Mirrors > Home > NFE 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 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ax-1 6 | . 2 | |
2 | pm2.27 35 | . 2 | |
3 | 1, 2 | impbid2 195 | 1 |
Colors of variables: wff setvar class |
Syntax hints: wi 4 wb 176 |
This theorem was proved from axioms: ax-mp 5 ax-1 6 ax-2 7 ax-3 8 |
This theorem depends on definitions: df-bi 177 |
This theorem is referenced by: pm5.5 326 a1bi 327 mtt 329 abai 770 dedlem0a 918 ceqsralt 2882 reu8 3032 csbiebt 3172 r19.3rz 3641 r19.3rzv 3643 ralidm 3653 fncnv 5158 |
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