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Definition df-plr 6811
Description: Define addition on signed reals. This is a "temporary" set used in the construction of complex numbers, and is intended to be used only by the construction. From Proposition 9-4.3 of [Gleason] p. 126. (Contributed by NM, 25-Aug-1995.)
Assertion
Ref Expression
df-plr  |-  +R  =  { <. <. x ,  y
>. ,  z >.  |  ( ( x  e. 
R.  /\  y  e.  R. )  /\  E. w E. v E. u E. f ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f >. ]  ~R  )  /\  z  =  [ <. ( w  +P.  u
) ,  ( v  +P.  f ) >. ]  ~R  ) ) }
Distinct variable group:    x, y, z, w, v, u, f

Detailed syntax breakdown of Definition df-plr
StepHypRef Expression
1 cplr 6397 . 2  class  +R
2 vx . . . . . . 7  setvar  x
32cv 1242 . . . . . 6  class  x
4 cnr 6393 . . . . . 6  class  R.
53, 4wcel 1393 . . . . 5  wff  x  e. 
R.
6 vy . . . . . . 7  setvar  y
76cv 1242 . . . . . 6  class  y
87, 4wcel 1393 . . . . 5  wff  y  e. 
R.
95, 8wa 97 . . . 4  wff  ( x  e.  R.  /\  y  e.  R. )
10 vw . . . . . . . . . . . . . 14  setvar  w
1110cv 1242 . . . . . . . . . . . . 13  class  w
12 vv . . . . . . . . . . . . . 14  setvar  v
1312cv 1242 . . . . . . . . . . . . 13  class  v
1411, 13cop 3378 . . . . . . . . . . . 12  class  <. w ,  v >.
15 cer 6392 . . . . . . . . . . . 12  class  ~R
1614, 15cec 6104 . . . . . . . . . . 11  class  [ <. w ,  v >. ]  ~R
173, 16wceq 1243 . . . . . . . . . 10  wff  x  =  [ <. w ,  v
>. ]  ~R
18 vu . . . . . . . . . . . . . 14  setvar  u
1918cv 1242 . . . . . . . . . . . . 13  class  u
20 vf . . . . . . . . . . . . . 14  setvar  f
2120cv 1242 . . . . . . . . . . . . 13  class  f
2219, 21cop 3378 . . . . . . . . . . . 12  class  <. u ,  f >.
2322, 15cec 6104 . . . . . . . . . . 11  class  [ <. u ,  f >. ]  ~R
247, 23wceq 1243 . . . . . . . . . 10  wff  y  =  [ <. u ,  f
>. ]  ~R
2517, 24wa 97 . . . . . . . . 9  wff  ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f >. ]  ~R  )
26 vz . . . . . . . . . . 11  setvar  z
2726cv 1242 . . . . . . . . . 10  class  z
28 cpp 6389 . . . . . . . . . . . . 13  class  +P.
2911, 19, 28co 5512 . . . . . . . . . . . 12  class  ( w  +P.  u )
3013, 21, 28co 5512 . . . . . . . . . . . 12  class  ( v  +P.  f )
3129, 30cop 3378 . . . . . . . . . . 11  class  <. (
w  +P.  u ) ,  ( v  +P.  f ) >.
3231, 15cec 6104 . . . . . . . . . 10  class  [ <. ( w  +P.  u ) ,  ( v  +P.  f ) >. ]  ~R
3327, 32wceq 1243 . . . . . . . . 9  wff  z  =  [ <. ( w  +P.  u ) ,  ( v  +P.  f )
>. ]  ~R
3425, 33wa 97 . . . . . . . 8  wff  ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f >. ]  ~R  )  /\  z  =  [ <. ( w  +P.  u
) ,  ( v  +P.  f ) >. ]  ~R  )
3534, 20wex 1381 . . . . . . 7  wff  E. f
( ( x  =  [ <. w ,  v
>. ]  ~R  /\  y  =  [ <. u ,  f
>. ]  ~R  )  /\  z  =  [ <. (
w  +P.  u ) ,  ( v  +P.  f ) >. ]  ~R  )
3635, 18wex 1381 . . . . . 6  wff  E. u E. f ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f >. ]  ~R  )  /\  z  =  [ <. ( w  +P.  u
) ,  ( v  +P.  f ) >. ]  ~R  )
3736, 12wex 1381 . . . . 5  wff  E. v E. u E. f ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f
>. ]  ~R  )  /\  z  =  [ <. (
w  +P.  u ) ,  ( v  +P.  f ) >. ]  ~R  )
3837, 10wex 1381 . . . 4  wff  E. w E. v E. u E. f ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f >. ]  ~R  )  /\  z  =  [ <. ( w  +P.  u
) ,  ( v  +P.  f ) >. ]  ~R  )
399, 38wa 97 . . 3  wff  ( ( x  e.  R.  /\  y  e.  R. )  /\  E. w E. v E. u E. f ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f
>. ]  ~R  )  /\  z  =  [ <. (
w  +P.  u ) ,  ( v  +P.  f ) >. ]  ~R  ) )
4039, 2, 6, 26coprab 5513 . 2  class  { <. <.
x ,  y >. ,  z >.  |  ( ( x  e.  R.  /\  y  e.  R. )  /\  E. w E. v E. u E. f ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f
>. ]  ~R  )  /\  z  =  [ <. (
w  +P.  u ) ,  ( v  +P.  f ) >. ]  ~R  ) ) }
411, 40wceq 1243 1  wff  +R  =  { <. <. x ,  y
>. ,  z >.  |  ( ( x  e. 
R.  /\  y  e.  R. )  /\  E. w E. v E. u E. f ( ( x  =  [ <. w ,  v >. ]  ~R  /\  y  =  [ <. u ,  f >. ]  ~R  )  /\  z  =  [ <. ( w  +P.  u
) ,  ( v  +P.  f ) >. ]  ~R  ) ) }
Colors of variables: wff set class
This definition is referenced by:  addsrpr  6828
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