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Mirrors > Home > ILE Home > Th. List > df-i | GIF version |
Description: Define the complex number i (the imaginary unit). (Contributed by NM, 22-Feb-1996.) |
Ref | Expression |
---|---|
df-i | ⊢ i = 〈0R, 1R〉 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | ci 6891 | . 2 class i | |
2 | c0r 6396 | . . 3 class 0R | |
3 | c1r 6397 | . . 3 class 1R | |
4 | 2, 3 | cop 3378 | . 2 class 〈0R, 1R〉 |
5 | 1, 4 | wceq 1243 | 1 wff i = 〈0R, 1R〉 |
Colors of variables: wff set class |
This definition is referenced by: axicn 6939 axi2m1 6949 axcnre 6955 |
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