Description: A member of an upper set of integers is a complex number. (Contributed by Glauco Siliprandi, 29-Jun-2017)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | eluzelcn | |- ( N e. ( ZZ>= ` M ) -> N e. CC ) |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | eluzelre | |- ( N e. ( ZZ>= ` M ) -> N e. RR ) |
|
| 2 | 1 | recnd | |- ( N e. ( ZZ>= ` M ) -> N e. CC ) |