Description: ( 2 x. _i ) =/= 0 . (Contributed by David A. Wheeler, 8-Dec-2018)
Ref | Expression | ||
---|---|---|---|
Assertion | 2muline0 | ⊢ ( 2 · i ) ≠ 0 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | 2cn | ⊢ 2 ∈ ℂ | |
2 | ax-icn | ⊢ i ∈ ℂ | |
3 | 2ne0 | ⊢ 2 ≠ 0 | |
4 | ine0 | ⊢ i ≠ 0 | |
5 | 1 2 3 4 | mulne0i | ⊢ ( 2 · i ) ≠ 0 |