Intuitionistic Logic Explorer |
< Previous
Next >
Nearby theorems |
||
Mirrors > Home > ILE Home > Th. List > notbid | Unicode version |
Description: Equivalence property for negation. Deduction form. (Contributed by NM, 21-May-1994.) (Revised by Mario Carneiro, 31-Jan-2015.) |
Ref | Expression |
---|---|
notbid.1 |
Ref | Expression |
---|---|
notbid |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | notbid.1 | . 2 | |
2 | notbi 656 | . 2 | |
3 | 1, 2 | syl 14 | 1 |
Copyright terms: Public domain | W3C validator |