***************************************************
,
−px2 + (a−q)xy + by2
1:
2: , (9) (10), , G 2-, 3- .. .
3: , , , , - , , ( ) G.
******************************************************************
: A ≡ −p; B ≡ ½(a−q); C ≡ b. (8)
aq−bp = 1. : a,b,p,q,
Ax2+2Bxy+Cy2
, a,b,p,q A, B C.
, :
(11)
(12)
Ax2+2Bxy+Cy2 = Ax'2 + 2Bx'y'+Cy'2 (13)
1: (11) (12), , , , , , 2− +1 ≥ 0. (14)
2: ,
(11) (12) -? , ,
(11)
:
, , .
3
(13), , , (14), (11) (12),
, .
, , ( )
= 0.
, .
(.(14)) ≤1, (. (12))
(15)
()
(15) .
:
(17)
, (16) (17)
- . (16)
, :
( , , ). :
|
|
I. C = Ac2 II. A/C = 0 III. C = −Ac2
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I.
C = Ac2 (18) (17), ,
(19)
,
:
:
, (20)
.
: (20), (19), ( x
) . , , .
II.
(17) A = 0,
:
,
:
. (21)
() ' , v.
y 2 = y' 2 ..
(21)
( ).
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III.
C = −Ac2 (17),
, (22)
. , v
. (23)
:
(24)
(23) (24) (22), :
(25)
(25), ,
:
(26)
.
' ( x' t') ( x t) v. (26): x , , , ', ' x'/t'=−v.
:
. (27)
(27) , ,
,
(28)
, , , , , , ( ' , v, , − v, ') , , , , v, , ,
.