Description: ( 2 x. _i ) e. CC . (Contributed by David A. Wheeler, 8-Dec-2018)
| Ref | Expression | ||
|---|---|---|---|
| Assertion | 2mulicn | |- ( 2 x. _i ) e. CC |
| Step | Hyp | Ref | Expression |
|---|---|---|---|
| 1 | 2cn | |- 2 e. CC |
|
| 2 | ax-icn | |- _i e. CC |
|
| 3 | 1 2 | mulcli | |- ( 2 x. _i ) e. CC |