:: JGRAPH_3 semantic presentation
Lemma24:
for x being real number holds (x ^2 ) + 1 > 0
Lemma25:
( dom proj1 = the carrier of (TOP-REAL 2) & dom proj2 = the carrier of (TOP-REAL 2) )
by FUNCT_2:def 1;
Lemma26:
for x, y being complex number holds
( not x ^2 = y ^2 or x = y or x = - y )
by SQUARE_1:109;
Lemma27:
for x being complex number holds
( not x ^2 = 1 or x = 1 or x = - 1 )
by SQUARE_1:110;
Lemma28:
for x being real number st 0 <= x & x <= 1 holds
x ^2 <= x
by SQUARE_1:111;
theorem Th1: :: JGRAPH_3:1
canceled;
theorem Th2: :: JGRAPH_3:2
canceled;
theorem Th3: :: JGRAPH_3:3
canceled;
theorem Th4: :: JGRAPH_3:4
canceled;
theorem Th5: :: JGRAPH_3:5
canceled;
theorem Th6: :: JGRAPH_3:6
canceled;
theorem Th7: :: JGRAPH_3:7
canceled;
theorem Th8: :: JGRAPH_3:8
canceled;
Lemma29:
for x being real number st (x ^2 ) - 1 <= 0 holds
( - 1 <= x & x <= 1 )
by SQUARE_1:112;
Lemma30:
for x, y, z being real number holds
( ( x < y & x < z ) iff x < min y,z )
by SQUARE_1:113;
Lemma31:
for x being real number st 0 < x holds
( x / 3 < x & x / 4 < x )
by XREAL_1:223, XREAL_1:225;
Lemma32:
for x being real number holds
( ( x >= 1 implies sqrt x >= 1 ) & ( x > 1 implies sqrt x > 1 ) )
by SQUARE_1:83, SQUARE_1:94, SQUARE_1:95;
theorem Th9: :: JGRAPH_3:9
theorem Th10: :: JGRAPH_3:10
theorem Th11: :: JGRAPH_3:11
theorem Th12: :: JGRAPH_3:12
theorem Th13: :: JGRAPH_3:13
definition
func Sq_Circ -> Function of the
carrier of
(TOP-REAL 2),the
carrier of
(TOP-REAL 2) means :
Def1:
:: JGRAPH_3:def 1
for
p being
Point of
(TOP-REAL 2) holds
( (
p = 0.REAL 2 implies
it . p = p ) & ( ( (
p `2 <= p `1 &
- (p `1 ) <= p `2 ) or (
p `2 >= p `1 &
p `2 <= - (p `1 ) ) ) &
p <> 0.REAL 2 implies
it . p = |[((p `1 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]| ) & ( (
p `2 <= p `1 &
- (p `1 ) <= p `2 ) or (
p `2 >= p `1 &
p `2 <= - (p `1 ) ) or not
p <> 0.REAL 2 or
it . p = |[((p `1 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]| ) );
existence
ex b1 being Function of the carrier of (TOP-REAL 2),the carrier of (TOP-REAL 2) st
for p being Point of (TOP-REAL 2) holds
( ( p = 0.REAL 2 implies b1 . p = p ) & ( ( ( p `2 <= p `1 & - (p `1 ) <= p `2 ) or ( p `2 >= p `1 & p `2 <= - (p `1 ) ) ) & p <> 0.REAL 2 implies b1 . p = |[((p `1 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]| ) & ( ( p `2 <= p `1 & - (p `1 ) <= p `2 ) or ( p `2 >= p `1 & p `2 <= - (p `1 ) ) or not p <> 0.REAL 2 or b1 . p = |[((p `1 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]| ) )
uniqueness
for b1, b2 being Function of the carrier of (TOP-REAL 2),the carrier of (TOP-REAL 2) st ( for p being Point of (TOP-REAL 2) holds
( ( p = 0.REAL 2 implies b1 . p = p ) & ( ( ( p `2 <= p `1 & - (p `1 ) <= p `2 ) or ( p `2 >= p `1 & p `2 <= - (p `1 ) ) ) & p <> 0.REAL 2 implies b1 . p = |[((p `1 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]| ) & ( ( p `2 <= p `1 & - (p `1 ) <= p `2 ) or ( p `2 >= p `1 & p `2 <= - (p `1 ) ) or not p <> 0.REAL 2 or b1 . p = |[((p `1 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]| ) ) ) & ( for p being Point of (TOP-REAL 2) holds
( ( p = 0.REAL 2 implies b2 . p = p ) & ( ( ( p `2 <= p `1 & - (p `1 ) <= p `2 ) or ( p `2 >= p `1 & p `2 <= - (p `1 ) ) ) & p <> 0.REAL 2 implies b2 . p = |[((p `1 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `2 ) / (p `1 )) ^2 ))))]| ) & ( ( p `2 <= p `1 & - (p `1 ) <= p `2 ) or ( p `2 >= p `1 & p `2 <= - (p `1 ) ) or not p <> 0.REAL 2 or b2 . p = |[((p `1 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 )))),((p `2 ) / (sqrt (1 + (((p `1 ) / (p `2 )) ^2 ))))]| ) ) ) holds
b1 = b2
end;
:: deftheorem Def1 defines Sq_Circ JGRAPH_3:def 1 :
theorem Th14: :: JGRAPH_3:14
theorem Th15: :: JGRAPH_3:15
theorem Th16: :: JGRAPH_3:16
theorem Th17: :: JGRAPH_3:17
theorem Th18: :: JGRAPH_3:18
theorem Th19: :: JGRAPH_3:19
theorem Th20: :: JGRAPH_3:20
Lemma143:
for K1 being non empty Subset of (TOP-REAL 2)
for q being Point of ((TOP-REAL 2) | K1) holds (proj2 | K1) . q = proj2 . q
Lemma145:
for K1 being non empty Subset of (TOP-REAL 2) holds proj2 | K1 is continuous Function of ((TOP-REAL 2) | K1),R^1
Lemma146:
for K1 being non empty Subset of (TOP-REAL 2)
for q being Point of ((TOP-REAL 2) | K1) holds (proj1 | K1) . q = proj1 . q
Lemma147:
for K1 being non empty Subset of (TOP-REAL 2) holds proj1 | K1 is continuous Function of ((TOP-REAL 2) | K1),R^1
theorem Th21: :: JGRAPH_3:21
theorem Th22: :: JGRAPH_3:22
theorem Th23: :: JGRAPH_3:23
theorem Th24: :: JGRAPH_3:24
Lemma155:
( ( ( (1.REAL 2) `2 <= (1.REAL 2) `1 & - ((1.REAL 2) `1 ) <= (1.REAL 2) `2 ) or ( (1.REAL 2) `2 >= (1.REAL 2) `1 & (1.REAL 2) `2 <= - ((1.REAL 2) `1 ) ) ) & 1.REAL 2 <> 0.REAL 2 )
by JGRAPH_2:13, REVROT_1:19;
Lemma156:
for K1 being non empty Subset of (TOP-REAL 2) holds dom (proj2 * (Sq_Circ | K1)) = the carrier of ((TOP-REAL 2) | K1)
Lemma157:
for K1 being non empty Subset of (TOP-REAL 2) holds dom (proj1 * (Sq_Circ | K1)) = the carrier of ((TOP-REAL 2) | K1)
Lemma158:
the carrier of (TOP-REAL 2) \ {(0.REAL 2)} <> {}
by JGRAPH_2:19;
theorem Th25: :: JGRAPH_3:25
Lemma164:
( ( ( (1.REAL 2) `1 <= (1.REAL 2) `2 & - ((1.REAL 2) `2 ) <= (1.REAL 2) `1 ) or ( (1.REAL 2) `1 >= (1.REAL 2) `2 & (1.REAL 2) `1 <= - ((1.REAL 2) `2 ) ) ) & 1.REAL 2 <> 0.REAL 2 )
by JGRAPH_2:13, REVROT_1:19;
theorem Th26: :: JGRAPH_3:26
theorem Th27: :: JGRAPH_3:27
theorem Th28: :: JGRAPH_3:28
theorem Th29: :: JGRAPH_3:29
theorem Th30: :: JGRAPH_3:30
theorem Th31: :: JGRAPH_3:31
theorem Th32: :: JGRAPH_3:32
theorem Th33: :: JGRAPH_3:33
theorem Th34: :: JGRAPH_3:34
theorem Th35: :: JGRAPH_3:35
theorem Th36: :: JGRAPH_3:36
theorem Th37: :: JGRAPH_3:37
theorem Th38: :: JGRAPH_3:38
theorem Th39: :: JGRAPH_3:39
theorem Th40: :: JGRAPH_3:40
theorem Th41: :: JGRAPH_3:41
theorem Th42: :: JGRAPH_3:42
theorem Th43: :: JGRAPH_3:43
theorem Th44: :: JGRAPH_3:44
theorem Th45: :: JGRAPH_3:45
theorem Th46: :: JGRAPH_3:46
Lemma312:
for K1 being non empty Subset of (TOP-REAL 2) holds proj2 * ((Sq_Circ " ) | K1) is Function of ((TOP-REAL 2) | K1),R^1
Lemma313:
for K1 being non empty Subset of (TOP-REAL 2) holds proj1 * ((Sq_Circ " ) | K1) is Function of ((TOP-REAL 2) | K1),R^1
theorem Th47: :: JGRAPH_3:47
theorem Th48: :: JGRAPH_3:48
theorem Th49: :: JGRAPH_3:49
theorem Th50: :: JGRAPH_3:50
theorem Th51: :: JGRAPH_3:51
theorem Th52: :: JGRAPH_3:52
Lemma322:
Sq_Circ " is one-to-one
by FUNCT_1:62;
theorem Th53: :: JGRAPH_3:53
canceled;
theorem Th54: :: JGRAPH_3:54
E327:
now
let px1 be
real number ;
assume
(px1 ^2 ) - 1
= 0
;
then
(px1 - 1) * (px1 + 1) = 0
;
then
(
px1 - 1
= 0 or
px1 + 1
= 0 )
by XCMPLX_1:6;
then
(
px1 = 0
+ 1 or
px1 + 1
= 0 )
;
then
(
px1 = 1 or
px1 = 0
- 1 )
;
hence
(
px1 = 1 or
px1 = - 1 )
;
end;
theorem Th55: :: JGRAPH_3:55