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Mirrors > Home > MPE Home > Th. List > df-i | Structured version Visualization version GIF version |
Description: Define the complex number i (the imaginary unit). (Contributed by NM, 22-Feb-1996.) (New usage is discouraged.) |
Ref | Expression |
---|---|
df-i | ⊢ i = ⟨0R, 1R⟩ |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ci 10974 | . 2 class i | |
2 | c0r 10723 | . . 3 class 0R | |
3 | c1r 10724 | . . 3 class 1R | |
4 | 2, 3 | cop 4579 | . 2 class ⟨0R, 1R⟩ |
5 | 1, 4 | wceq 1540 | 1 wff i = ⟨0R, 1R⟩ |
Colors of variables: wff setvar class |
This definition is referenced by: axicn 11007 axi2m1 11016 axcnre 11021 avril1 29115 |
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