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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 |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c1 6982 | . 2 | |
2 | c1r 6489 | . . 3 | |
3 | c0r 6488 | . . 3 | |
4 | 2, 3 | cop 3401 | . 2 |
5 | 1, 4 | wceq 1284 | 1 |
Colors of variables: wff set class |
This definition is referenced by: pitonnlem1 7013 pitonnlem2 7015 peano1nnnn 7020 peano2nnnn 7021 recidpirq 7026 ax1cn 7029 ax1re 7030 axi2m1 7041 ax0lt1 7042 ax1rid 7043 axprecex 7046 nntopi 7060 |
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