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Mirrors > Home > ILE Home > Th. List > df-0r | Unicode version |
Description: Define signed real constant 0. This is a "temporary" set used in the construction of complex numbers, and is intended to be used only by the construction. From Proposition 9-4.2 of [Gleason] p. 126. (Contributed by NM, 9-Aug-1995.) |
Ref | Expression |
---|---|
df-0r |
Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c0r 6396 | . 2 | |
2 | c1p 6390 | . . . 4 | |
3 | 2, 2 | cop 3378 | . . 3 |
4 | cer 6394 | . . 3 | |
5 | 3, 4 | cec 6104 | . 2 |
6 | 1, 5 | wceq 1243 | 1 |
Colors of variables: wff set class |
This definition is referenced by: gt0srpr 6833 0r 6835 m1p1sr 6845 0lt1sr 6850 0idsr 6852 00sr 6854 pitoregt0 6925 |
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