Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > anbi12d | Unicode version |
Description: Deduction joining two equivalences to form equivalence of conjunctions. (Contributed by NM, 5-Aug-1993.) |
Ref | Expression |
---|---|
anbi12d.1 | |
anbi12d.2 |
Ref | Expression |
---|---|
anbi12d |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | anbi12d.1 | . . 3 | |
2 | 1 | anbi1d 462 | . 2 |
3 | anbi12d.2 | . . 3 | |
4 | 3 | anbi2d 461 | . 2 |
5 | 2, 4 | bitrd 187 | 1 |
Copyright terms: Public domain | W3C validator |