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Mirrors > Home > QLE Home > Th. List > i2id | Unicode version |
Description: Identity law for Dishkant conditional. |
Ref | Expression |
---|---|
i2id |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | df-i2 45 | . 2 | |
2 | anidm 111 | . . . 4 | |
3 | 2 | lor 70 | . . 3 |
4 | df-t 41 | . . . 4 | |
5 | 4 | ax-r1 35 | . . 3 |
6 | 3, 5 | ax-r2 36 | . 2 |
7 | 1, 6 | ax-r2 36 | 1 |
Colors of variables: term |
Syntax hints: wb 1 wn 4 wo 6 wa 7 wt 8 wi2 13 |
This theorem was proved from axioms: ax-a1 30 ax-a2 31 ax-a5 34 ax-r1 35 ax-r2 36 ax-r4 37 ax-r5 38 |
This theorem depends on definitions: df-a 40 df-t 41 df-f 42 df-i2 45 |
This theorem is referenced by: oago3.29 889 |
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