let p be Point of (TOP-REAL 2); :: thesis: ( p <> 0. (TOP-REAL 2) implies ( ( ( ( p `1 <= p `2 & - (p `2 ) <= p `1 ) or ( p `1 >= p `2 & p `1 <= - (p `2 ) ) ) implies (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]| ) & ( ( p `1 <= p `2 & - (p `2 ) <= p `1 ) or ( p `1 >= p `2 & p `1 <= - (p `2 ) ) or (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]| ) ) )
assume A1:
p <> 0. (TOP-REAL 2)
; :: thesis: ( ( ( ( p `1 <= p `2 & - (p `2 ) <= p `1 ) or ( p `1 >= p `2 & p `1 <= - (p `2 ) ) ) implies (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]| ) & ( ( p `1 <= p `2 & - (p `2 ) <= p `1 ) or ( p `1 >= p `2 & p `1 <= - (p `2 ) ) or (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]| ) )
hereby :: thesis: ( ( p `1 <= p `2 & - (p `2 ) <= p `1 ) or ( p `1 >= p `2 & p `1 <= - (p `2 ) ) or (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]| )
assume A2:
( (
p `1 <= p `2 &
- (p `2 ) <= p `1 ) or (
p `1 >= p `2 &
p `1 <= - (p `2 ) ) )
;
:: thesis: (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|now per cases
( ( p `1 <= p `2 & - (p `2 ) <= p `1 ) or ( p `1 >= p `2 & p `1 <= - (p `2 ) ) )
by A2;
case A10:
(
p `1 >= p `2 &
p `1 <= - (p `2 ) )
;
:: thesis: (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|now assume A11:
( (
p `2 <= p `1 &
- (p `1 ) <= p `2 ) or (
p `2 >= p `1 &
p `2 <= - (p `1 ) ) )
;
:: thesis: (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|now per cases
( p `1 = p `2 or p `1 = - (p `2 ) )
by A12;
case A13:
p `1 = - (p `2 )
;
:: thesis: (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|then A14:
p `1 <> 0
by A1, EUCLID:57, EUCLID:58;
A15:
- (p `1 ) = p `2
by A13;
p `2 <> 0
by A1, A13, EUCLID:57, EUCLID:58;
then A16:
(p `1 ) / (p `2 ) = - 1
by A13, XCMPLX_1:198;
(p `2 ) / (p `1 ) = - 1
by A14, A15, XCMPLX_1:198;
hence
(Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|
by A1, A11, A16, Th38;
:: thesis: verum end; end; end; hence
(Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|
;
:: thesis: verum end; hence
(Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|
by A1, Th38;
:: thesis: verum end; end; end; hence
(Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]|
;
:: thesis: verum
end;
assume A17:
( not ( p `1 <= p `2 & - (p `2 ) <= p `1 ) & not ( p `1 >= p `2 & p `1 <= - (p `2 ) ) )
; :: thesis: (Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]|
A18:
( - (p `2 ) < p `1 implies - (- (p `2 )) > - (p `1 ) )
by XREAL_1:26;
( - (p `2 ) > p `1 implies - (- (p `2 )) < - (p `1 ) )
by XREAL_1:26;
hence
(Sq_Circ " ) . p = |[((p `1 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) * (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]|
by A1, A17, A18, Th38; :: thesis: verum