Description: 2 divides 0. That means 0 is even. (Contributed by AV, 11-Feb-2020) (Revised by AV, 23-Jun-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | z0even | |- 2 || 0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2z | |- 2 e. ZZ |
|
2 | dvds0 | |- ( 2 e. ZZ -> 2 || 0 ) |
|
3 | 1 2 | ax-mp | |- 2 || 0 |