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Definition df-plp 10017
Description: Define addition on positive reals. This is a "temporary" set used in the construction of complex numbers df-c 10154, and is intended to be used only by the construction. From Proposition 9-3.5 of [Gleason] p. 123. (Contributed by NM, 18-Nov-1995.) (New usage is discouraged.)
Assertion
Ref Expression
df-plp +P = (𝑥P, 𝑦P ↦ {𝑤 ∣ ∃𝑣𝑥𝑢𝑦 𝑤 = (𝑣 +Q 𝑢)})
Distinct variable group:   𝑥,𝑦,𝑤,𝑣,𝑢

Detailed syntax breakdown of Definition df-plp
StepHypRef Expression
1 cpp 9895 . 2 class +P
2 vx . . 3 setvar 𝑥
3 vy . . 3 setvar 𝑦
4 cnp 9893 . . 3 class P
5 vw . . . . . . . 8 setvar 𝑤
65cv 1631 . . . . . . 7 class 𝑤
7 vv . . . . . . . . 9 setvar 𝑣
87cv 1631 . . . . . . . 8 class 𝑣
9 vu . . . . . . . . 9 setvar 𝑢
109cv 1631 . . . . . . . 8 class 𝑢
11 cplq 9889 . . . . . . . 8 class +Q
128, 10, 11co 6814 . . . . . . 7 class (𝑣 +Q 𝑢)
136, 12wceq 1632 . . . . . 6 wff 𝑤 = (𝑣 +Q 𝑢)
143cv 1631 . . . . . 6 class 𝑦
1513, 9, 14wrex 3051 . . . . 5 wff 𝑢𝑦 𝑤 = (𝑣 +Q 𝑢)
162cv 1631 . . . . 5 class 𝑥
1715, 7, 16wrex 3051 . . . 4 wff 𝑣𝑥𝑢𝑦 𝑤 = (𝑣 +Q 𝑢)
1817, 5cab 2746 . . 3 class {𝑤 ∣ ∃𝑣𝑥𝑢𝑦 𝑤 = (𝑣 +Q 𝑢)}
192, 3, 4, 4, 18cmpt2 6816 . 2 class (𝑥P, 𝑦P ↦ {𝑤 ∣ ∃𝑣𝑥𝑢𝑦 𝑤 = (𝑣 +Q 𝑢)})
201, 19wceq 1632 1 wff +P = (𝑥P, 𝑦P ↦ {𝑤 ∣ ∃𝑣𝑥𝑢𝑦 𝑤 = (𝑣 +Q 𝑢)})
Colors of variables: wff setvar class
This definition is referenced by:  plpv  10044  dmplp  10046  addclprlem2  10051  addclpr  10052  addasspr  10056  distrlem1pr  10059  distrlem4pr  10060  distrlem5pr  10061  ltaddpr  10068  ltexprlem6  10075  ltexprlem7  10076
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