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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 |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | c0r 7275 |
. 2
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2 | c1p 7269 |
. . . 4
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3 | 2, 2 | cop 3594 |
. . 3
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4 | cer 7273 |
. . 3
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5 | 3, 4 | cec 6526 |
. 2
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6 | 1, 5 | wceq 1353 |
1
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Colors of variables: wff set class |
This definition is referenced by: gt0srpr 7725 0r 7727 m1p1sr 7737 0lt1sr 7742 0idsr 7744 00sr 7746 suplocsrlempr 7784 pitoregt0 7826 |
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