Description: An integer is even iff its quotient with 2 is an integer. This is a representation of even numbers without using the divides relation, see zeo and zeo2 . (Contributed by AV, 22-Jun-2021)
Ref | Expression | ||
---|---|---|---|
Assertion | evend2 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2z | |
|
2 | 2ne0 | |
|
3 | dvdsval2 | |
|
4 | 1 2 3 | mp3an12 | |