n rr I E 383 3S0 3E) » » a m » i © f f l jeo » » » aro » 39D s o 360 © 3fiO » K a » e » 3«^ BO mi mo VA 'x'^UITG IDC CHUYEN NCaHiiP M -van BO GAO tjjfa DUNG ( ^ csiuiro !^Zl^IiXa£^irCB3SK ojc ISQ^ ^»v>;t,i •: - wr;; :;, i I' ^^^-i^ Ha-nOl - 1978 B03K)3roiÊ03ÊO3fi02eO3ro2â2tO3*O3ằKO3EOKO3e03ằrô)3ÊO2fi03eO3â3^ 5^Y5 MUC I U C PhSn loo' dSu SxmsjL Chifo^np: n t : I*i§t sfi ptocme; phap n£i sijy t t ^ e n t i n h d5 g i a i 6§ja dung phuPcmg t r i n h toan ti^ S M§t vai k h a i nigm vo ty sal phan syy r^ng cho § M§t v a i tn^cfr^'hgj? dglc MJ^t cua phop 1$P ( ) §4 V5 in§t logii phuctog phq? l§p b^c cao thrf h a i g i S i gSn dung phifcmg t r i n h to5n ti> • 52 37 C^^ctofa: haj M$t v a i phi:?cmg phap ngi suy tSng qu5t svQT T§ng d | g i a i gin dung phtfcmg trinli tofin tiJ g o D^t v8n etS 45 i M§t v a i kiaai nlga ve cSng thrJo n§i suy Tfiu-tcm si^y rOng i^ §2 "VS ffiOt v a i pbucng phSp n§i s^y tong quat s i ^ rgng g i a i gSn dung phu^c?ng t r i n h toan tiJ va si; h $ l t v cua n6 • • • Gfaifgya;;!^ l?a t Ph8n iJng d^ng i Mgt s5 T^ag d\wig cho 3191 v a i to^n ti> cy thS 1.1 Phi?c?n6 t r i n h haci thi/c vo^ bi§n s8 thi;c 1^2 H$ phtfc^ng t r i n h dgii sfi p h i tuySn hc$c siSu v l ^ t 1.5 i ^ Phi^c^ng t r i n h t i c h phan p h i txo^Sn CSc v i d\i bang 06 61 61 62 G5 68 Tai l l § u t r i c b dan 70 o£o - p - T l f c i5ng dyng g i a i t i c h ham ^to nghien C'\i c i c ph'.^'ng phap g i a i gan dung cac l o p i phi?o'nc t r i n h n g t c5ch tong q u i t da dem iQi n h i e u k e t qua v6 cung quan trgni^ '2u» ti^o'nt; cua g i a i t i c h ham khong nhu^ng cho phep dcn [^Inn hoe each n h i n cho n h i e u phUHo'ng phfip khac ma eon giup t a ki^m t o a n m i o u GO' t i n h t o a n t r o n g nhiou l i n h vy^c khoa hgc k h a c nhau, •vf dy nhu^ dpi s5 t^iySn t i n h , phu'C^ng t r i n h v i p h a n , phutmg irinh t l c h p h a n , g i a i t l c h p h i tuyen v v * TThieu l o ^ i h a i toan k h a c oou eo che v i t du&i l?ng chiing (1) Ax = 0, t r o n g A l u t o a n t u xac d^nh t r o n g ngz khong g i a n noo va CO g i a t r t t r o n g mgt khong i;ian cung l o ^ i DS g i a i gan dung phu^c-rig' t r i n h ( ) ngi;?o'i t a dung n h i e u phi?o'ng phap k h £ c L.oi phv.Xi^r^'; phap dou oo nhu'ng 'J*ii (Tien va nhu-ng hgin che n h a t d i n h 2n?o'ng hg»p A l a t o a n tu' tuy3n t i n h , cac k e t quo ve g i a i ;;Sn dmux, da duvc : Gratnoxenxki / f I G j , Otcga F"Mj^ Moctmic / " I B J T va n h i e u cong t r i n h (Tu^g^c a>ng b6 tror_g cue t^^ c h i to.4n hgc k h a c / " J - ^ , / f - > Trong ban l u y n vun chung t o i se t r i n h bay mgt s6 k e t qua t h u g e l i n h vi/c d o Ban lu§.n van gom ba chu'o'^ - ;' - Chu-^ng t r i n h bay mgt Q6 cac phiAD'ng phap ngi cuy tuyen tfnh dS g l M gSn d'ms phuv^ng t r i n h t o a n ti ( ) Thi/c r a phuang t r i n h ( ) da '*u^c nhiou t ^ c g i o nghion oS\ \ni Niuto^n C^^'^J* p h w n g phap S t e f f e n x e n - Aitt:en £ ^'y^ ^'^ J ^ phu\>'nu: phap l^p clip k tong q u a t (phut^ng phap Sruede - Tsobu'sep) /f ; 27 J - • • y t r o n g s6 phuang phap r i u t c n - ' - i n g t o r o v l c h t-uy di.;vo su' ct\mg i^ng r o i , nh>mg nhuyc diem chinh l a t r o n g nhiSu tru?o»ng hgj) v i t ; c xac ^ n h toi'n ti> ^ A x J " ^ (d^o ham theo P r e s o ) thu^'n^i ^gp kho khan v-o ph'^e t ^ p ITgoai t r o n g n g t G6 tr-fo'ng hgp Cvl dy k h i t^iei c^ e X, (i ^ , ) D6i v c i nhu'ng -xyYian x,-^^ x^ , ( i = , ) , o5 d3.rih tn?ng X t h i A(XQ, 0:^) l a ni$t t o a n tu tuySn t i n h OJoan tu' t-uyen txnh A(::^, oi-j ) thoa man d i e u k i p n (1.1) AC-,, x^) ( x - „ ) = A::^ - A ^ , difg'e Qg± l a ty s a i ph;'i^ui bye nhSt ei\a h-an tru'^u tu'o'ng Ax l y ^ t ? 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