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Definition df-rq 10328
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 10532, 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.)
Assertion
Ref Expression
df-rq *Q = ( ·Q “ {1Q})

Detailed syntax breakdown of Definition df-rq
StepHypRef Expression
1 crq 10268 . 2 class *Q
2 cmq 10267 . . . 4 class ·Q
32ccnv 5548 . . 3 class ·Q
4 c1q 10264 . . . 4 class 1Q
54csn 4559 . . 3 class {1Q}
63, 5cima 5552 . 2 class ( ·Q “ {1Q})
71, 6wceq 1528 1 wff *Q = ( ·Q “ {1Q})
Colors of variables: wff setvar class
This definition is referenced by:  recmulnq  10375  dmrecnq  10379
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