Description: Deduction from real number to complex number. (Contributed by NM, 26-Oct-1999)
Ref | Expression | ||
---|---|---|---|
Hypothesis | recnd.1 | |- ( ph -> A e. RR ) |
|
Assertion | recnd | |- ( ph -> A e. CC ) |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | recnd.1 | |- ( ph -> A e. RR ) |
|
2 | recn | |- ( A e. RR -> A e. CC ) |
|
3 | 1 2 | syl | |- ( ph -> A e. CC ) |