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Mirrors > Home > ILE Home > Th. List > df-1 | Unicode version |
Description: Define the complex number 1. (Contributed by NM, 22-Feb-1996.) |
Ref | Expression |
---|---|
df-1 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c1 6890 |
. 2
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2 | c1r 6397 |
. . 3
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3 | c0r 6396 |
. . 3
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4 | 2, 3 | cop 3378 |
. 2
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5 | 1, 4 | wceq 1243 |
1
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Colors of variables: wff set class |
This definition is referenced by: pitonnlem1 6921 pitonnlem2 6923 peano1nnnn 6928 peano2nnnn 6929 recidpirq 6934 ax1cn 6937 ax1re 6938 axi2m1 6949 ax0lt1 6950 ax1rid 6951 axprecex 6954 nntopi 6968 ax-0lt1 6990 |
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