Description: The set of rational numbers is countable. (Contributed by Glauco Siliprandi, 24-Dec-2020)
Ref | Expression | ||
---|---|---|---|
Assertion | qct | |- QQ ~<_ _om |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | qenom | |- QQ ~~ _om |
|
2 | endom | |- ( QQ ~~ _om -> QQ ~<_ _om ) |
|
3 | 1 2 | ax-mp | |- QQ ~<_ _om |