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Mirrors > Home > MPE Home > Th. List > df-rq | Structured version Unicode version |
Description: Define reciprocal on positive fractions. It means the same thing as one divided by the argument (although we don't define full division since we will never need it). This is a "temporary" set used in the construction of complex numbers df-c 9398, and is intended to be used only by the construction. From Proposition 9-2.5 of [Gleason] p. 119, who uses an asterisk to denote this unary operation. (Contributed by NM, 6-Mar-1996.) (New usage is discouraged.) |
Ref | Expression |
---|---|
df-rq |
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Step | Hyp | Ref | Expression |
---|---|---|---|
1 | crq 9134 |
. 2
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2 | cmq 9133 |
. . . 4
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3 | 2 | ccnv 4946 |
. . 3
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4 | c1q 9130 |
. . . 4
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5 | 4 | csn 3984 |
. . 3
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6 | 3, 5 | cima 4950 |
. 2
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7 | 1, 6 | wceq 1370 |
1
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Colors of variables: wff setvar class |
This definition is referenced by: recmulnq 9243 dmrecnq 9247 |
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