Description: The predicate "is an even number". An even number and 2 have 2 as greatest common divisor. (Contributed by AV, 1-Jul-2020) (Revised by AV, 8-Aug-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | isevengcd2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2nn | |
|
2 | gcdzeq | |
|
3 | 1 2 | mpan | |
4 | 3 | bicomd | |