Description: The predicate "is an odd number". An odd number is an integer which is not divisible by 2. (Contributed by AV, 18-Jun-2020)
Ref | Expression | ||
---|---|---|---|
Assertion | isodd3 | |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | breq2 | |
|
2 | 1 | notbid | |
3 | dfodd3 | |
|
4 | 2 3 | elrab2 | |