ABSTRACT

H "4% H "" " ( FG 7

" ( f "" ' FG 8 ( FG Φn

FG ( "" n 0, 1, ( x0 d 4 ," ( "4 FG " A

" "" $ ' F

!3G

, ( FG Φn n0 A

FG ( "" n 0, 1, " C 7 " " , 8 ' (

FG Φn n0 A FG ( "" n 0, 1,

H , " % $

( ( FG 8" "

" % 6," " ( ("4

, ( " $"% ( " ,

$ # & $ . ( ,

"4 $ - , ,14 $%7

" % ( 7 " , $ *

" " , H A ,

, , $ 0 ,' 3: ("

$ 9

H 4 1 ( xn F ΦnG ( " ( FG ( ," F"% ,"(% 6, G "

, 1 " A" (

Æ

8 ( (

a % 0 b % "" . H b 0 FG "" , " FG "" , b 0 " ( (""4

. a, b % + a 0 / & 0 0 1" 2 + x0 d % / 3

$,, b 0 + a 1 % " ( FG + " a 1 FG "

$ " "" 03 " ( FG %

" ( FG a > 1 4 " " F#G ( a < 1

- ' /

FG

4" "

C % ,4 !3 "7

FG

4" "

C % ,4 !3 "7

FG

4" "

C % ,4 !3 "7

FG

"

C % ,4 !3 "7

#

Æ

6 " 4 6," (" ( " (

A 7 " 4 " Æ

n0 3 0 3 / & 0

0 1"42 + x0 d 3

+ 3 -

- ' / " ( 5(

,(" "7 ,14 ( ,4

" 4 44 (

( ( 4 " ( "7

,14 ( "4 " ) 4 4"

" " ,

" ( ( " ( ," "

H " ,A 4 ( 4 n ( " ( ( " H

" ,A " ( n 0

&

" % " Æ A 7

" " " " Æ

Æ

) " (

(""4 "I FG " 4 " knn! ( % k FG " "

,""% , ( "% ( "7

.