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Theorem mulext1 8656
Description: Left extensionality for complex multiplication. (Contributed by Jim Kingdon, 22-Feb-2020.)
Assertion
Ref Expression
mulext1  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  (
( A  x.  C
) #  ( B  x.  C )  ->  A #  B ) )

Proof of Theorem mulext1
Dummy variables  u  v  w  x  y  z are mutually distinct and distinct from all other variables.
StepHypRef Expression
1 cnre 8039 . . 3  |-  ( C  e.  CC  ->  E. u  e.  RR  E. v  e.  RR  C  =  ( u  +  ( _i  x.  v ) ) )
213ad2ant3 1022 . 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 8039 . . . . . . 7  |-  ( B  e.  CC  ->  E. z  e.  RR  E. w  e.  RR  B  =  ( z  +  ( _i  x.  w ) ) )
433ad2ant2 1021 . . . . . 6  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  E. z  e.  RR  E. w  e.  RR  B  =  ( z  +  ( _i  x.  w ) ) )
54ad2antrr 488 . . . . 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 8039 . . . . . . . . . . 11  |-  ( A  e.  CC  ->  E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y ) ) )
763ad2ant1 1020 . . . . . . . . . 10  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y ) ) )
87adantr 276 . . . . . . . . 9  |-  ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  ->  E. x  e.  RR  E. y  e.  RR  A  =  ( x  +  ( _i  x.  y ) ) )
98ad3antrrr 492 . . . . . . . 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 535 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( ( ( ( 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 )
1110recnd 8072 . . . . . . . . . . . . . . . 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 )
) )  ->  x  e.  CC )
12 simprl 529 . . . . . . . . . . . . . . . . . . 19  |-  ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  ->  u  e.  RR )
1312ad2antrr 488 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( ( ( 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 )
1413ad3antrrr 492 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( ( ( ( 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 )
1514recnd 8072 . . . . . . . . . . . . . . . 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 )
) )  ->  u  e.  CC )
1611, 15mulcld 8064 . . . . . . . . . . . . . . 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  x.  u )  e.  CC )
17 simplrr 536 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( ( ( ( ( ( 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 )
1817recnd 8072 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( ( ( ( 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 )
19 simprr 531 . . . . . . . . . . . . . . . . . . . 20  |-  ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  ->  v  e.  RR )
2019ad2antrr 488 . . . . . . . . . . . . . . . . . . 19  |-  ( ( ( ( ( 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 )
2120ad3antrrr 492 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( ( ( ( ( ( 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 )
2221recnd 8072 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( ( ( ( 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 )
2318, 22mulcld 8064 . . . . . . . . . . . . . . . 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  x.  v )  e.  CC )
2423negcld 8341 . . . . . . . . . . . . . . 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 (
y  x.  v )  e.  CC )
25 simprl 529 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( ( ( 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 )
2625ad3antrrr 492 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( ( ( ( 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 )
2726recnd 8072 . . . . . . . . . . . . . . . 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 )
) )  ->  z  e.  CC )
2827, 15mulcld 8064 . . . . . . . . . . . . . . 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  x.  u )  e.  CC )
29 simprr 531 . . . . . . . . . . . . . . . . . . 19  |-  ( ( ( ( ( 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 )
3029ad3antrrr 492 . . . . . . . . . . . . . . . . . 18  |-  ( ( ( ( ( ( ( ( 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 )
3130recnd 8072 . . . . . . . . . . . . . . . . 17  |-  ( ( ( ( ( ( ( ( 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 )
3231, 22mulcld 8064 . . . . . . . . . . . . . . . 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  x.  v )  e.  CC )
3332negcld 8341 . . . . . . . . . . . . . . 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 (
w  x.  v )  e.  CC )
34 addext 8654 . . . . . . . . . . . . . . 15  |-  ( ( ( ( x  x.  u )  e.  CC  /\  -u ( y  x.  v
)  e.  CC )  /\  ( ( z  x.  u )  e.  CC  /\  -u (
w  x.  v )  e.  CC ) )  ->  ( ( ( x  x.  u )  +  -u ( y  x.  v ) ) #  ( ( z  x.  u
)  +  -u (
w  x.  v ) )  ->  ( (
x  x.  u ) #  ( z  x.  u
)  \/  -u (
y  x.  v ) #  -u ( w  x.  v
) ) ) )
3516, 24, 28, 33, 34syl22anc 1250 . . . . . . . . . . . . . 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  x.  u )  +  -u ( y  x.  v
) ) #  ( ( z  x.  u )  +  -u ( w  x.  v ) )  -> 
( ( x  x.  u ) #  ( z  x.  u )  \/  -u ( y  x.  v
) #  -u ( w  x.  v ) ) ) )
36 remulext1 8643 . . . . . . . . . . . . . . . 16  |-  ( ( x  e.  RR  /\  z  e.  RR  /\  u  e.  RR )  ->  (
( x  x.  u
) #  ( z  x.  u )  ->  x #  z ) )
3710, 26, 14, 36syl3anc 1249 . . . . . . . . . . . . . . 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  x.  u
) #  ( z  x.  u )  ->  x #  z ) )
38 apneg 8655 . . . . . . . . . . . . . . . . 17  |-  ( ( ( y  x.  v
)  e.  CC  /\  ( w  x.  v
)  e.  CC )  ->  ( ( y  x.  v ) #  ( w  x.  v )  <->  -u ( y  x.  v
) #  -u ( w  x.  v ) ) )
3923, 32, 38syl2anc 411 . . . . . . . . . . . . . . . 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  x.  v
) #  ( w  x.  v )  <->  -u ( y  x.  v ) #  -u ( w  x.  v
) ) )
40 remulext1 8643 . . . . . . . . . . . . . . . . 17  |-  ( ( y  e.  RR  /\  w  e.  RR  /\  v  e.  RR )  ->  (
( y  x.  v
) #  ( w  x.  v )  ->  y #  w ) )
4117, 30, 21, 40syl3anc 1249 . . . . . . . . . . . . . . . 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  x.  v
) #  ( w  x.  v )  ->  y #  w ) )
4239, 41sylbird 170 . . . . . . . . . . . . . . 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 ( y  x.  v
) #  -u ( w  x.  v )  ->  y #  w ) )
4337, 42orim12d 787 . . . . . . . . . . . . . 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  x.  u ) #  ( z  x.  u )  \/  -u ( y  x.  v
) #  -u ( w  x.  v ) )  -> 
( x #  z  \/  y #  w ) ) )
4435, 43syld 45 . . . . . . . . . . . . 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  x.  u )  +  -u ( y  x.  v
) ) #  ( ( z  x.  u )  +  -u ( w  x.  v ) )  -> 
( x #  z  \/  y #  w ) ) )
4515, 18mulcld 8064 . . . . . . . . . . . . . . . 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 )
) )  ->  (
u  x.  y )  e.  CC )
4622, 11mulcld 8064 . . . . . . . . . . . . . . . 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  x.  x )  e.  CC )
4715, 31mulcld 8064 . . . . . . . . . . . . . . . 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 )
) )  ->  (
u  x.  w )  e.  CC )
4822, 27mulcld 8064 . . . . . . . . . . . . . . . 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  x.  z )  e.  CC )
49 addext 8654 . . . . . . . . . . . . . . . 16  |-  ( ( ( ( u  x.  y )  e.  CC  /\  ( v  x.  x
)  e.  CC )  /\  ( ( u  x.  w )  e.  CC  /\  ( v  x.  z )  e.  CC ) )  -> 
( ( ( u  x.  y )  +  ( v  x.  x
) ) #  ( ( u  x.  w )  +  ( v  x.  z ) )  -> 
( ( u  x.  y ) #  ( u  x.  w )  \/  ( v  x.  x
) #  ( v  x.  z ) ) ) )
5045, 46, 47, 48, 49syl22anc 1250 . . . . . . . . . . . . . . 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  x.  y )  +  ( v  x.  x ) ) #  ( ( u  x.  w )  +  ( v  x.  z
) )  ->  (
( u  x.  y
) #  ( u  x.  w )  \/  (
v  x.  x ) #  ( v  x.  z
) ) ) )
51 remulext2 8644 . . . . . . . . . . . . . . . . 17  |-  ( ( y  e.  RR  /\  w  e.  RR  /\  u  e.  RR )  ->  (
( u  x.  y
) #  ( u  x.  w )  ->  y #  w ) )
5217, 30, 14, 51syl3anc 1249 . . . . . . . . . . . . . . . 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 )
) )  ->  (
( u  x.  y
) #  ( u  x.  w )  ->  y #  w ) )
53 remulext2 8644 . . . . . . . . . . . . . . . . 17  |-  ( ( x  e.  RR  /\  z  e.  RR  /\  v  e.  RR )  ->  (
( v  x.  x
) #  ( v  x.  z )  ->  x #  z ) )
5410, 26, 21, 53syl3anc 1249 . . . . . . . . . . . . . . . 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  x.  x
) #  ( v  x.  z )  ->  x #  z ) )
5552, 54orim12d 787 . . . . . . . . . . . . . . 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  x.  y ) #  ( u  x.  w )  \/  ( v  x.  x
) #  ( v  x.  z ) )  -> 
( y #  w  \/  x #  z ) ) )
5650, 55syld 45 . . . . . . . . . . . . . 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  x.  y )  +  ( v  x.  x ) ) #  ( ( u  x.  w )  +  ( v  x.  z
) )  ->  (
y #  w  \/  x #  z ) ) )
57 orcom 729 . . . . . . . . . . . . . 14  |-  ( ( y #  w  \/  x #  z )  <->  ( x #  z  \/  y #  w
) )
5856, 57imbitrdi 161 . . . . . . . . . . . . 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 )
) )  ->  (
( ( u  x.  y )  +  ( v  x.  x ) ) #  ( ( u  x.  w )  +  ( v  x.  z
) )  ->  (
x #  z  \/  y #  w ) ) )
5944, 58jaod 718 . . . . . . . . . . . 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  x.  u )  + 
-u ( y  x.  v ) ) #  ( ( z  x.  u
)  +  -u (
w  x.  v ) )  \/  ( ( u  x.  y )  +  ( v  x.  x ) ) #  ( ( u  x.  w
)  +  ( v  x.  z ) ) )  ->  ( x #  z  \/  y #  w
) ) )
60 simpr 110 . . . . . . . . . . . . . . 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 )
) )  ->  A  =  ( x  +  ( _i  x.  y
) ) )
61 simplr 528 . . . . . . . . . . . . . . . 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 )
) )
6261ad3antrrr 492 . . . . . . . . . . . . . . 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
) ) )
6360, 62oveq12d 5943 . . . . . . . . . . . . . 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  x.  C )  =  ( ( x  +  ( _i  x.  y ) )  x.  ( u  +  ( _i  x.  v ) ) ) )
64 simpllr 534 . . . . . . . . . . . . . . 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 )
) )  ->  B  =  ( z  +  ( _i  x.  w
) ) )
6564, 62oveq12d 5943 . . . . . . . . . . . . . 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  x.  C )  =  ( ( z  +  ( _i  x.  w ) )  x.  ( u  +  ( _i  x.  v ) ) ) )
6663, 65breq12d 4047 . . . . . . . . . . . . 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  x.  C
) #  ( B  x.  C )  <->  ( (
x  +  ( _i  x.  y ) )  x.  ( u  +  ( _i  x.  v
) ) ) #  ( ( z  +  ( _i  x.  w ) )  x.  ( u  +  ( _i  x.  v ) ) ) ) )
67 mulreim 8648 . . . . . . . . . . . . . . 15  |-  ( ( ( x  e.  RR  /\  y  e.  RR )  /\  ( u  e.  RR  /\  v  e.  RR ) )  -> 
( ( x  +  ( _i  x.  y
) )  x.  (
u  +  ( _i  x.  v ) ) )  =  ( ( ( x  x.  u
)  +  -u (
y  x.  v ) )  +  ( _i  x.  ( ( u  x.  y )  +  ( v  x.  x
) ) ) ) )
6810, 17, 14, 21, 67syl22anc 1250 . . . . . . . . . . . . . 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 ) )  x.  ( u  +  ( _i  x.  v ) ) )  =  ( ( ( x  x.  u )  +  -u ( y  x.  v ) )  +  ( _i  x.  (
( u  x.  y
)  +  ( v  x.  x ) ) ) ) )
69 mulreim 8648 . . . . . . . . . . . . . . 15  |-  ( ( ( z  e.  RR  /\  w  e.  RR )  /\  ( u  e.  RR  /\  v  e.  RR ) )  -> 
( ( z  +  ( _i  x.  w
) )  x.  (
u  +  ( _i  x.  v ) ) )  =  ( ( ( z  x.  u
)  +  -u (
w  x.  v ) )  +  ( _i  x.  ( ( u  x.  w )  +  ( v  x.  z
) ) ) ) )
7026, 30, 14, 21, 69syl22anc 1250 . . . . . . . . . . . . . 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 ) )  x.  ( u  +  ( _i  x.  v ) ) )  =  ( ( ( z  x.  u )  +  -u ( w  x.  v ) )  +  ( _i  x.  (
( u  x.  w
)  +  ( v  x.  z ) ) ) ) )
7168, 70breq12d 4047 . . . . . . . . . . . . 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  +  ( _i  x.  y
) )  x.  (
u  +  ( _i  x.  v ) ) ) #  ( ( z  +  ( _i  x.  w ) )  x.  ( u  +  ( _i  x.  v ) ) )  <->  ( (
( x  x.  u
)  +  -u (
y  x.  v ) )  +  ( _i  x.  ( ( u  x.  y )  +  ( v  x.  x
) ) ) ) #  ( ( ( z  x.  u )  + 
-u ( w  x.  v ) )  +  ( _i  x.  (
( u  x.  w
)  +  ( v  x.  z ) ) ) ) ) )
7210, 14remulcld 8074 . . . . . . . . . . . . . . 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  x.  u )  e.  RR )
7317, 21remulcld 8074 . . . . . . . . . . . . . . . 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  x.  v )  e.  RR )
7473renegcld 8423 . . . . . . . . . . . . . . 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 (
y  x.  v )  e.  RR )
7572, 74readdcld 8073 . . . . . . . . . . . . . 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  x.  u
)  +  -u (
y  x.  v ) )  e.  RR )
7614, 17remulcld 8074 . . . . . . . . . . . . . . 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  x.  y )  e.  RR )
7721, 10remulcld 8074 . . . . . . . . . . . . . . 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 )
) )  ->  (
v  x.  x )  e.  RR )
7876, 77readdcld 8073 . . . . . . . . . . . . . 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  x.  y
)  +  ( v  x.  x ) )  e.  RR )
7926, 14remulcld 8074 . . . . . . . . . . . . . . 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  x.  u )  e.  RR )
8030, 21remulcld 8074 . . . . . . . . . . . . . . . 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  x.  v )  e.  RR )
8180renegcld 8423 . . . . . . . . . . . . . . 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 (
w  x.  v )  e.  RR )
8279, 81readdcld 8073 . . . . . . . . . . . . . 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  x.  u
)  +  -u (
w  x.  v ) )  e.  RR )
8314, 30remulcld 8074 . . . . . . . . . . . . . . 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  x.  w )  e.  RR )
8421, 26remulcld 8074 . . . . . . . . . . . . . . 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 )
) )  ->  (
v  x.  z )  e.  RR )
8583, 84readdcld 8073 . . . . . . . . . . . . . 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  x.  w
)  +  ( v  x.  z ) )  e.  RR )
86 apreim 8647 . . . . . . . . . . . . . 14  |-  ( ( ( ( ( x  x.  u )  + 
-u ( y  x.  v ) )  e.  RR  /\  ( ( u  x.  y )  +  ( v  x.  x ) )  e.  RR )  /\  (
( ( z  x.  u )  +  -u ( w  x.  v
) )  e.  RR  /\  ( ( u  x.  w )  +  ( v  x.  z ) )  e.  RR ) )  ->  ( (
( ( x  x.  u )  +  -u ( y  x.  v
) )  +  ( _i  x.  ( ( u  x.  y )  +  ( v  x.  x ) ) ) ) #  ( ( ( z  x.  u )  +  -u ( w  x.  v ) )  +  ( _i  x.  (
( u  x.  w
)  +  ( v  x.  z ) ) ) )  <->  ( (
( x  x.  u
)  +  -u (
y  x.  v ) ) #  ( ( z  x.  u )  + 
-u ( w  x.  v ) )  \/  ( ( u  x.  y )  +  ( v  x.  x ) ) #  ( ( u  x.  w )  +  ( v  x.  z
) ) ) ) )
8775, 78, 82, 85, 86syl22anc 1250 . . . . . . . . . . . . 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  x.  u )  + 
-u ( y  x.  v ) )  +  ( _i  x.  (
( u  x.  y
)  +  ( v  x.  x ) ) ) ) #  ( ( ( z  x.  u
)  +  -u (
w  x.  v ) )  +  ( _i  x.  ( ( u  x.  w )  +  ( v  x.  z
) ) ) )  <-> 
( ( ( x  x.  u )  + 
-u ( y  x.  v ) ) #  ( ( z  x.  u
)  +  -u (
w  x.  v ) )  \/  ( ( u  x.  y )  +  ( v  x.  x ) ) #  ( ( u  x.  w
)  +  ( v  x.  z ) ) ) ) )
8866, 71, 873bitrd 214 . . . . . . . . . . . 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.  C
) #  ( B  x.  C )  <->  ( (
( x  x.  u
)  +  -u (
y  x.  v ) ) #  ( ( z  x.  u )  + 
-u ( w  x.  v ) )  \/  ( ( u  x.  y )  +  ( v  x.  x ) ) #  ( ( u  x.  w )  +  ( v  x.  z
) ) ) ) )
89 apreim 8647 . . . . . . . . . . . . 13  |-  ( ( ( x  e.  RR  /\  y  e.  RR )  /\  ( z  e.  RR  /\  w  e.  RR ) )  -> 
( ( x  +  ( _i  x.  y
) ) #  ( z  +  ( _i  x.  w ) )  <->  ( x #  z  \/  y #  w
) ) )
9010, 17, 26, 30, 89syl22anc 1250 . . . . . . . . . . . 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  +  ( _i  x.  y ) ) #  ( z  +  ( _i  x.  w
) )  <->  ( x #  z  \/  y #  w
) ) )
9159, 88, 903imtr4d 203 . . . . . . . . . . 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  x.  C
) #  ( B  x.  C )  ->  (
x  +  ( _i  x.  y ) ) #  ( z  +  ( _i  x.  w ) ) ) )
9260, 64breq12d 4047 . . . . . . . . . . 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 ) ) ) )
9391, 92sylibrd 169 . . . . . . . . . 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  x.  C
) #  ( B  x.  C )  ->  A #  B ) )
9493ex 115 . . . . . . . . 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  x.  C
) #  ( B  x.  C )  ->  A #  B ) ) )
9594rexlimdvva 2622 . . . . . . . 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  x.  C
) #  ( B  x.  C )  ->  A #  B ) ) )
969, 95mpd 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  x.  C
) #  ( B  x.  C )  ->  A #  B ) )
9796ex 115 . . . . . 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  x.  C
) #  ( B  x.  C )  ->  A #  B ) ) )
9897rexlimdvva 2622 . . . . 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  x.  C
) #  ( B  x.  C )  ->  A #  B ) ) )
995, 98mpd 13 . . . 4  |-  ( ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  (
u  e.  RR  /\  v  e.  RR )
)  /\  C  =  ( u  +  (
_i  x.  v )
) )  ->  (
( A  x.  C
) #  ( B  x.  C )  ->  A #  B ) )
10099ex 115 . . 3  |-  ( ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  /\  ( u  e.  RR  /\  v  e.  RR ) )  ->  ( C  =  ( u  +  ( _i  x.  v
) )  ->  (
( A  x.  C
) #  ( B  x.  C )  ->  A #  B ) ) )
101100rexlimdvva 2622 . 2  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  ( E. u  e.  RR  E. v  e.  RR  C  =  ( u  +  ( _i  x.  v
) )  ->  (
( A  x.  C
) #  ( B  x.  C )  ->  A #  B ) ) )
1022, 101mpd 13 1  |-  ( ( A  e.  CC  /\  B  e.  CC  /\  C  e.  CC )  ->  (
( A  x.  C
) #  ( B  x.  C )  ->  A #  B ) )
Colors of variables: wff set class
Syntax hints:    -> wi 4    /\ wa 104    <-> wb 105    \/ wo 709    /\ w3a 980    = wceq 1364    e. wcel 2167   E.wrex 2476   class class class wbr 4034  (class class class)co 5925   CCcc 7894   RRcr 7895   _ici 7898    + caddc 7899    x. cmul 7901   -ucneg 8215   # cap 8625
This theorem was proved from axioms:  ax-mp 5  ax-1 6  ax-2 7  ax-ia1 106  ax-ia2 107  ax-ia3 108  ax-in1 615  ax-in2 616  ax-io 710  ax-5 1461  ax-7 1462  ax-gen 1463  ax-ie1 1507  ax-ie2 1508  ax-8 1518  ax-10 1519  ax-11 1520  ax-i12 1521  ax-bndl 1523  ax-4 1524  ax-17 1540  ax-i9 1544  ax-ial 1548  ax-i5r 1549  ax-13 2169  ax-14 2170  ax-ext 2178  ax-sep 4152  ax-pow 4208  ax-pr 4243  ax-un 4469  ax-setind 4574  ax-cnex 7987  ax-resscn 7988  ax-1cn 7989  ax-1re 7990  ax-icn 7991  ax-addcl 7992  ax-addrcl 7993  ax-mulcl 7994  ax-mulrcl 7995  ax-addcom 7996  ax-mulcom 7997  ax-addass 7998  ax-mulass 7999  ax-distr 8000  ax-i2m1 8001  ax-0lt1 8002  ax-1rid 8003  ax-0id 8004  ax-rnegex 8005  ax-precex 8006  ax-cnre 8007  ax-pre-ltirr 8008  ax-pre-ltwlin 8009  ax-pre-lttrn 8010  ax-pre-apti 8011  ax-pre-ltadd 8012  ax-pre-mulgt0 8013  ax-pre-mulext 8014
This theorem depends on definitions:  df-bi 117  df-3an 982  df-tru 1367  df-fal 1370  df-nf 1475  df-sb 1777  df-eu 2048  df-mo 2049  df-clab 2183  df-cleq 2189  df-clel 2192  df-nfc 2328  df-ne 2368  df-nel 2463  df-ral 2480  df-rex 2481  df-reu 2482  df-rab 2484  df-v 2765  df-sbc 2990  df-dif 3159  df-un 3161  df-in 3163  df-ss 3170  df-pw 3608  df-sn 3629  df-pr 3630  df-op 3632  df-uni 3841  df-br 4035  df-opab 4096  df-id 4329  df-xp 4670  df-rel 4671  df-cnv 4672  df-co 4673  df-dm 4674  df-iota 5220  df-fun 5261  df-fv 5267  df-riota 5880  df-ov 5928  df-oprab 5929  df-mpo 5930  df-pnf 8080  df-mnf 8081  df-ltxr 8083  df-sub 8216  df-neg 8217  df-reap 8619  df-ap 8626
This theorem is referenced by:  mulext2  8657  mulext  8658  mulap0  8698  apmul1  8832
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