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Theorem apadd1 8527
Description: Addition respects apartness. Analogue of addcan 8099 for apartness. (Contributed by Jim Kingdon, 13-Feb-2020.)
Assertion
Ref Expression
apadd1  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) )

Proof of Theorem apadd1
Dummy variables  u  v  w  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cnre 7916 . . 3  |-  ( C  e.  CC  ->  E. u  e.  RR  E. v  e.  RR  C  =  ( u  +  ( _i  x.  v ) ) )
213ad2ant3 1015 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  E. u  e.  RR  E. v  e.  RR  C  =  ( u  +  ( _i  x.  v ) ) )
3 cnre 7916 . . . . . . 7  |-  ( B  e.  CC  ->  E. z  e.  RR  E. w  e.  RR  B  =  ( z  +  ( _i  x.  w ) ) )
433ad2ant2 1014 . . . . . 6  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  E. z  e.  RR  E. w  e.  RR  B  =  ( z  +  ( _i  x.  w ) ) )
54ad2antrr 485 . . . . 5  |-  ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  ->  E. z  e.  RR  E. w  e.  RR  B  =  ( z  +  ( _i  x.  w ) ) )
6 cnre 7916 . . . . . . . . . . 11  |-  ( A  e.  CC  ->  E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y ) ) )
763ad2ant1 1013 . . . . . . . . . 10  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y ) ) )
87ad2antrr 485 . . . . . . . . 9  |-  ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  ->  E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y ) ) )
98ad2antrr 485 . . . . . . . 8  |-  ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  ->  E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y ) ) )
10 simplrl 530 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  x  e.  RR )
11 simplrr 531 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  y  e.  RR )
12 simprl 526 . . . . . . . . . . . . 13  |-  ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  ->  z  e.  RR )
1312ad3antrrr 489 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  z  e.  RR )
14 simprr 527 . . . . . . . . . . . . 13  |-  ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  ->  w  e.  RR )
1514ad3antrrr 489 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  w  e.  RR )
16 apreim 8522 . . . . . . . . . . . 12  |-  ( ( ( x  e.  RR  /\  y  e.  RR )  /\  ( z  e.  RR  /\  w  e.  RR ) )  -> 
( ( x  +  ( _i  x.  y
) ) #  ( z  +  ( _i  x.  w ) )  <->  ( x #  z  \/  y #  w
) ) )
1710, 11, 13, 15, 16syl22anc 1234 . . . . . . . . . . 11  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( x  +  ( _i  x.  y ) ) #  ( z  +  ( _i  x.  w
) )  <->  ( x #  z  \/  y #  w
) ) )
18 simpr 109 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  A  =  ( x  +  ( _i  x.  y
) ) )
19 simpllr 529 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  B  =  ( z  +  ( _i  x.  w
) ) )
2018, 19breq12d 4002 . . . . . . . . . . 11  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  ( A #  B  <->  ( x  +  ( _i  x.  y
) ) #  ( z  +  ( _i  x.  w ) ) ) )
21 simprl 526 . . . . . . . . . . . . . . . 16  |-  ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  ->  u  e.  RR )
2221ad2antrr 485 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  ->  u  e.  RR )
2322ad3antrrr 489 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  u  e.  RR )
2410, 23readdcld 7949 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
x  +  u )  e.  RR )
25 simprr 527 . . . . . . . . . . . . . . . 16  |-  ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  ->  v  e.  RR )
2625ad2antrr 485 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  ->  v  e.  RR )
2726ad3antrrr 489 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  v  e.  RR )
2811, 27readdcld 7949 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
y  +  v )  e.  RR )
2913, 23readdcld 7949 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
z  +  u )  e.  RR )
3015, 27readdcld 7949 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
w  +  v )  e.  RR )
31 apreim 8522 . . . . . . . . . . . . 13  |-  ( ( ( ( x  +  u )  e.  RR  /\  ( y  +  v )  e.  RR )  /\  ( ( z  +  u )  e.  RR  /\  ( w  +  v )  e.  RR ) )  -> 
( ( ( x  +  u )  +  ( _i  x.  (
y  +  v ) ) ) #  ( ( z  +  u )  +  ( _i  x.  ( w  +  v
) ) )  <->  ( (
x  +  u ) #  ( z  +  u
)  \/  ( y  +  v ) #  ( w  +  v ) ) ) )
3224, 28, 29, 30, 31syl22anc 1234 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( ( x  +  u )  +  ( _i  x.  ( y  +  v ) ) ) #  ( ( z  +  u )  +  ( _i  x.  (
w  +  v ) ) )  <->  ( (
x  +  u ) #  ( z  +  u
)  \/  ( y  +  v ) #  ( w  +  v ) ) ) )
3310recnd 7948 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  x  e.  CC )
34 ax-icn 7869 . . . . . . . . . . . . . . . . 17  |-  _i  e.  CC
3534a1i 9 . . . . . . . . . . . . . . . 16  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  _i  e.  CC )
3611recnd 7948 . . . . . . . . . . . . . . . 16  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  y  e.  CC )
3735, 36mulcld 7940 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
_i  x.  y )  e.  CC )
3823recnd 7948 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  u  e.  CC )
3927recnd 7948 . . . . . . . . . . . . . . . 16  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  v  e.  CC )
4035, 39mulcld 7940 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
_i  x.  v )  e.  CC )
4133, 37, 38, 40add4d 8088 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( x  +  ( _i  x.  y ) )  +  ( u  +  ( _i  x.  v ) ) )  =  ( ( x  +  u )  +  ( ( _i  x.  y )  +  ( _i  x.  v ) ) ) )
42 simplr 525 . . . . . . . . . . . . . . . 16  |-  ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  ->  C  =  ( u  +  (
_i  x.  v )
) )
4342ad3antrrr 489 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  C  =  ( u  +  ( _i  x.  v
) ) )
4418, 43oveq12d 5871 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  ( A  +  C )  =  ( ( x  +  ( _i  x.  y ) )  +  ( u  +  ( _i  x.  v ) ) ) )
4535, 36, 39adddid 7944 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
_i  x.  ( y  +  v ) )  =  ( ( _i  x.  y )  +  ( _i  x.  v
) ) )
4645oveq2d 5869 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( x  +  u
)  +  ( _i  x.  ( y  +  v ) ) )  =  ( ( x  +  u )  +  ( ( _i  x.  y )  +  ( _i  x.  v ) ) ) )
4741, 44, 463eqtr4d 2213 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  ( A  +  C )  =  ( ( x  +  u )  +  ( _i  x.  (
y  +  v ) ) ) )
4813recnd 7948 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  z  e.  CC )
4915recnd 7948 . . . . . . . . . . . . . . . 16  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  w  e.  CC )
5035, 49mulcld 7940 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
_i  x.  w )  e.  CC )
5148, 50, 38, 40add4d 8088 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( z  +  ( _i  x.  w ) )  +  ( u  +  ( _i  x.  v ) ) )  =  ( ( z  +  u )  +  ( ( _i  x.  w )  +  ( _i  x.  v ) ) ) )
5219, 43oveq12d 5871 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  ( B  +  C )  =  ( ( z  +  ( _i  x.  w ) )  +  ( u  +  ( _i  x.  v ) ) ) )
5335, 49, 39adddid 7944 . . . . . . . . . . . . . . 15  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
_i  x.  ( w  +  v ) )  =  ( ( _i  x.  w )  +  ( _i  x.  v
) ) )
5453oveq2d 5869 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( z  +  u
)  +  ( _i  x.  ( w  +  v ) ) )  =  ( ( z  +  u )  +  ( ( _i  x.  w )  +  ( _i  x.  v ) ) ) )
5551, 52, 543eqtr4d 2213 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  ( B  +  C )  =  ( ( z  +  u )  +  ( _i  x.  (
w  +  v ) ) ) )
5647, 55breq12d 4002 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( A  +  C
) #  ( B  +  C )  <->  ( (
x  +  u )  +  ( _i  x.  ( y  +  v ) ) ) #  ( ( z  +  u
)  +  ( _i  x.  ( w  +  v ) ) ) ) )
57 reapadd1 8515 . . . . . . . . . . . . . 14  |-  ( ( x  e.  RR  /\  z  e.  RR  /\  u  e.  RR )  ->  (
x #  z  <->  ( x  +  u ) #  ( z  +  u ) ) )
5810, 13, 23, 57syl3anc 1233 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
x #  z  <->  ( x  +  u ) #  ( z  +  u ) ) )
59 reapadd1 8515 . . . . . . . . . . . . . 14  |-  ( ( y  e.  RR  /\  w  e.  RR  /\  v  e.  RR )  ->  (
y #  w  <->  ( y  +  v ) #  ( w  +  v ) ) )
6011, 15, 27, 59syl3anc 1233 . . . . . . . . . . . . 13  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
y #  w  <->  ( y  +  v ) #  ( w  +  v ) ) )
6158, 60orbi12d 788 . . . . . . . . . . . 12  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( x #  z  \/  y #  w )  <->  ( (
x  +  u ) #  ( z  +  u
)  \/  ( y  +  v ) #  ( w  +  v ) ) ) )
6232, 56, 613bitr4d 219 . . . . . . . . . . 11  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  (
( A  +  C
) #  ( B  +  C )  <->  ( x #  z  \/  y #  w
) ) )
6317, 20, 623bitr4d 219 . . . . . . . . . 10  |-  ( ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  /\  A  =  ( x  +  (
_i  x.  y )
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) )
6463ex 114 . . . . . . . . 9  |-  ( ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  /\  C  =  ( u  +  ( _i  x.  v ) ) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  /\  (
x  e.  RR  /\  y  e.  RR )
)  ->  ( A  =  ( x  +  ( _i  x.  y
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) ) )
6564rexlimdvva 2595 . . . . . . . 8  |-  ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  ->  ( E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) ) )
669, 65mpd 13 . . . . . . 7  |-  ( ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  /\  B  =  ( z  +  ( _i  x.  w ) ) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) )
6766ex 114 . . . . . 6  |-  ( ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  /\  (
z  e.  RR  /\  w  e.  RR )
)  ->  ( B  =  ( z  +  ( _i  x.  w
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) ) )
6867rexlimdvva 2595 . . . . 5  |-  ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  ->  ( E. z  e.  RR  E. w  e.  RR  B  =  ( z  +  ( _i  x.  w
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) ) )
695, 68mpd 13 . . . 4  |-  ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) )
7069ex 114 . . 3  |-  ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  ->  ( C  =  ( u  +  ( _i  x.  v
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) ) )
7170rexlimdvva 2595 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  ( E. u  e.  RR  E. v  e.  RR  C  =  ( u  +  ( _i  x.  v
) )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) ) )
722, 71mpd 13 1  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  ( A #  B  <->  ( A  +  C ) #  ( B  +  C ) ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 103    <-> wb 104    \/ wo 703    /\ w3a 973    = wceq 1348    e. wcel 2141   E.wrex 2449   class class class wbr 3989  (class class class)co 5853   CCcc 7772   RRcr 7773   _ici 7776    + caddc 7777    x. cmul 7779   # cap 8500
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 105  ax-ia2 106  ax-ia3 107  ax-in1 609  ax-in2 610  ax-io 704  ax-5 1440  ax-7 1441  ax-gen 1442  ax-ie1 1486  ax-ie2 1487  ax-8 1497  ax-10 1498  ax-11 1499  ax-i12 1500  ax-bndl 1502  ax-4 1503  ax-17 1519  ax-i9 1523  ax-ial 1527  ax-i5r 1528  ax-13 2143  ax-14 2144  ax-ext 2152  ax-sep 4107  ax-pow 4160  ax-pr 4194  ax-un 4418  ax-setind 4521  ax-cnex 7865  ax-resscn 7866  ax-1cn 7867  ax-1re 7868  ax-icn 7869  ax-addcl 7870  ax-addrcl 7871  ax-mulcl 7872  ax-mulrcl 7873  ax-addcom 7874  ax-mulcom 7875  ax-addass 7876  ax-mulass 7877  ax-distr 7878  ax-i2m1 7879  ax-0lt1 7880  ax-1rid 7881  ax-0id 7882  ax-rnegex 7883  ax-precex 7884  ax-cnre 7885  ax-pre-ltirr 7886  ax-pre-lttrn 7888  ax-pre-apti 7889  ax-pre-ltadd 7890  ax-pre-mulgt0 7891
This theorem depends on definitions:  df-bi 116  df-3an 975  df-tru 1351  df-fal 1354  df-nf 1454  df-sb 1756  df-eu 2022  df-mo 2023  df-clab 2157  df-cleq 2163  df-clel 2166  df-nfc 2301  df-ne 2341  df-nel 2436  df-ral 2453  df-rex 2454  df-reu 2455  df-rab 2457  df-v 2732  df-sbc 2956  df-dif 3123  df-un 3125  df-in 3127  df-ss 3134  df-pw 3568  df-sn 3589  df-pr 3590  df-op 3592  df-uni 3797  df-br 3990  df-opab 4051  df-id 4278  df-xp 4617  df-rel 4618  df-cnv 4619  df-co 4620  df-dm 4621  df-iota 5160  df-fun 5200  df-fv 5206  df-riota 5809  df-ov 5856  df-oprab 5857  df-mpo 5858  df-pnf 7956  df-mnf 7957  df-ltxr 7959  df-sub 8092  df-neg 8093  df-reap 8494  df-ap 8501
This theorem is referenced by:  apadd2  8528  addext  8529  apsub1  8561  subap0  8562
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