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Mirrors > Home > ILE Home > Th. List > bibi1i | Unicode version |
Description: Inference adding a biconditional to the right in an equivalence. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
bibi.a |
Ref | Expression |
---|---|
bibi1i |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | bicom 138 | . 2 | |
2 | bibi.a | . . 3 | |
3 | 2 | bibi2i 225 | . 2 |
4 | bicom 138 | . 2 | |
5 | 1, 3, 4 | 3bitri 204 | 1 |
Colors of variables: wff set class |
Syntax hints: wb 103 |
This theorem was proved from axioms: ax-1 5 ax-2 6 ax-mp 7 ax-ia1 104 ax-ia2 105 ax-ia3 106 |
This theorem depends on definitions: df-bi 115 |
This theorem is referenced by: bibi12i 227 bilukdc 1327 sbrbis 1876 necon1abiddc 2307 necon1bbiddc 2308 necon4abiddc 2318 elrab3t 2748 ddifstab 3104 ssequn1 3142 asymref 4730 |
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