One method for solution of the Cauchy problem for singular parabolic equations

We consider a system of parabolic type with singular coefficients on boundary hyperplanes. We reduce the solution of the Cauchy problem to an integral equation and determine the fundamental solution as the kernel of the inverse operator of the Cauchy problem.

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Datum:1992
Hauptverfasser: Matiichuk , M. I., Матийчук , М. И.
Format: Artikel
Sprache:Russisch
Veröffentlicht: Institute of Mathematics, NAS of Ukraine 1992
Online Zugang:https://umj.imath.kiev.ua/index.php/umj/article/view/7805
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Назва журналу:Ukrains’kyi Matematychnyi Zhurnal
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Ukrains’kyi Matematychnyi Zhurnal
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author Matiichuk , M. I.
Матийчук , М. И.
author_facet Matiichuk , M. I.
Матийчук , М. И.
author_sort Matiichuk , M. I.
baseUrl_str https://umj.imath.kiev.ua/index.php/umj/oai
collection OJS
datestamp_date 2023-09-14T12:03:56Z
description We consider a system of parabolic type with singular coefficients on boundary hyperplanes. We reduce the solution of the Cauchy problem to an integral equation and determine the fundamental solution as the kernel of the inverse operator of the Cauchy problem.
first_indexed 2026-03-24T03:34:00Z
format Article
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(- a~)k" - 11,£ II = 0 (3) 1k'l+ 21k"l= 2b yJI.oBJieTBopmoT HepaBeHCTBy R~ "'(t , x, a) ~ - {>o I a 12b JI.JI H acex (t, x) E TT, o EE, x E;t_, = E-;;, 60 = canst > 0 llJIH pewe 1-mH 3a11a4H (I), (2) paccMoTpHM c11cTeMy c «3aMopmKeHHbIMH» K09lpqJHUl'leHT3MH iJu Y 7ft = lkl=lk'ltilk" !=2' (t, y) E □. (4) G 1:- T ;,r+ I T 0"G ' 1: ' "· - r ~"G (t, 1i, X , <:, , y) = ... (t , l , X - <:, , X , y) = ," , Xr + I \: rJ (5) 6 KOTOPOH G (t, 1i, x; y) - npeo fi pa3o BaHHe <l>ypbe - 6 ecceJIH, G (t, 'L, X, !f) = ~' e'" '"'da' S Q (!, l, a; Y /v,+ 1 (CTr+ 1X,+ 1) .•• ivn (CT nXnJ l<J"f "da, E, E+ n-r- e M . ~ MATt-ll:tl-!YK. ,m JS5tv UU'ii-oubJ. j,,cp. MaT. ¥yp11., 1992, r. 44, M I 135 Q (t , 't, a; y ) - HopMaJibHa51 ¢y1-1JlaMei-1TaJibI-Ia51 MaTp m . .1.a peweHHtt .11.BOHC'l)• BeHHOH K (4) CHCTeMbl (6) T1; - orreparnp 0606m em1oro CJlBHra, n T!'.f (x) = C..,1 Sf( ... , V x7 + 1:,7 - 2x11:,1 cos a, ... ) si rr~"1da. 0 E cm1 A,, (t, y) Herrpepb!BI-161 rr o t E 10, TJ, rrpH<JeM pas 11 0Mep1-10 OTHOCHTeJibHO y rr pH I k I= 2b, TO Q (t , -r, s; y} , s = a + iy, ueJiaH tj>y rmumr apryMe1ITOB ,,._ l/2b s = s (t - -r)- H B CHJIY ycJIOBl15l B-napa60JIH 1!J-IOCTH BblIIOJI IUJeTC51 oue I11<a (7> H a ocHosa1-11-111 JieMM o n peo6pa3osa1111H Becce.111 [31 11 <!>yphe [ 1, c . 36] UeJibIX cpyHI<llHH MaTpHUa f pHHa G (t, 't, X, s; y) K3K Cl)YIIKlllUI KOM IIJl eKC- 1-lblX apryMeIITOB (x ' - s') (t - 't)- l /20 , x" (t- , )- l /2b , s" (t - 't)- I/2b ecn, u.e­ JI351 , i1eniaH no II OCJie)],HHM apryMe IITaM, H rrp11 )].eikTBHTeJibHbIX apr yMel!­ Tax en pase,11.Jmso Hepase 1-1cTBO ~- ....--... q X T x•{exp (-c l x - s' I )}, n - r n._,+Jk'I -H+21k•1 2b X n.., = r + 2 L (v,+ s + 1 ), q = 2b (2b - 1 )- 1, ; = x (t - -r)- 1/2b. s= l (8) Tenepb perneHHe 3a.n.a<JH K orn11 (1), (2) HllJ.eM a s11.n.e cy MMbl noTeHu 11 aJIOB I u (t, x) = S G (t , 0, x , 1:, ; s) cp (£) (s")"0ds + S d-r S G (t, -r, x , s; s) µ- x E+ O E+ n n (9) Dpe.n.rroJiara51 anpuopu µ (t, x) HerrpepbrnHofl rr p11 t > 0 rro lIHHH, BCJie.n.crn11e npHMeHeHHH K u (t, x) onep arnpa L (t, x, D) noJiyqaeM JlJI51 µ (t, x) HHTerpaJih­ Hoe ypas1-1eHue r.n.e I ht (t, x) = F (t, x) + s d-r s K (t, T, x , s) µ (-r, £) (s")"•ds, (10] 0 E+ n F (t , x) = f (t, x) + S K (t, 0, x, s) cp (s) (s")"0 ds, E+ n K (t, 't , X , s) = - LG (t , -r , X , 1:,; s) = ~ IAk (t, x ) - Ah (t, s) 6 2b , ik11 X .;...J lk l~ 2b k ' k" X Dx,Bx•G, 621>,ikl = 0, I k J < 2b, 6 21J .2b = I. EcJIH Ah E c(wo) (IT) np11 I k I = 2b, TO C y 'leTOM oueHOK (8) n oJiyqaeM Hei)a­ BeHCTBO n._,+2b I K (t, ct' , x, s) J ~ Co (t - -r)-~ ffiu (2bVt - T) rr:. {e-l lX-~' 1\ ( 11) 136 ISSN 0041-6053. YKp. ,IIUT, :J/CYPH.., 1992, T. 44, M I .ll.JIH creneHH0FO M0,lI,YJIH - Henpepb!BH0CTH ffi (t) = ta CTp0HTC51 pe30JibBeHTa H,lI,pa K = 1(1 - oo l R (t, . , x , s) = ~ 5 dl3 5 Ki (t , 13, x , y) KP <13 , ., Y, s) (y")"•dy + Ki (t , ., x , s) P= l't e+ n ( 12) KaK ypaBHeHHH C KB33Hper yJIHpHbJM 51,ll,p0M. B cJiyqae o 6 w.e ro M0,/1,ym, He npepbIBl!0CTH ffi0 (t), y,/1,0BJieTBopmow.ero h ycJIOBHIO .IlHHH Affi0 (n) = 5 ffi0 (•) .-1d1: = F 0 (h) < oo, pa s1 10Me pHaH H a6co- o JIIOTHaH CXO!lH MOCTb pH,ll,a H eiiMaHa ( 12) ycTa 113BJIHBaeTCH C nOM0LUblO Me­ T0,/1,HKH pa60Tbl [2] . PeweHHe ypas1-1e HHH ( IO) O,Uf-1031!3lJH0 onpe,ll,eJIHeTCH n o cpopMyJie I ~~ (t, x) = F (t, x) + S d1: SR (t, er, x , s) F (•, s) (i;"f •ds ( 13) o e+ n H y.nosJieTBOpHeT He p a s e HCTBaM 2bv- 1 I µ (t, x) I < C (It le + ffio ( t) r I cp lk, ( 14) I Li ,,µ (t, x) I< C [ ffi 1 (I b.x I)+ F 0 (I b.x I) + ffi1 (I b.x I)] ,-i (I cp le+ If L.,1), r.ne ffi/ (t) - M0,lI,YJib Henpepb!BHOCTH cpyHKUHH f (t, x), a ffi1 (t) - K03Cpq:lHUHeH- 1'0B A,. (t, x) c I k I< 2b. Oo,lI,CT3BJIH51 µ (t, x) H3 (1 3) B q:>opMyny (9) H BbinOJII-IHH 3 aMe1-1y nopH,lI,Ka HHTerpwposaHHH , noJiyq aeM I u (t, x) = 5 Z (t, 0, x, s) cp (s) (s")"•ds + 5 d. S Z (t, ., x, s) f (•, s) (s'')"0dl;. s+ o e+ · n n 3 .nech t z (t, 't', X, I;) = G (t, <t', x, I;; s) + s dj3 5 G (t, 13, x, y; y ) R (13, 't, y , s) (y"t•dy. -r e+ n (1 6) E cm1 cpyHKUH H ffi* (t) = ffit (t) + F O (t) + ffi1 (t) B HepaBeHCTBe ( 14) Y,lI,OBJieT­ BOpHeT ycJIOBHIO s w* (t) t - 1dt < oo, TO o6beMHbie noTeHUH3Jlb] B (9) H ( 16) +o HMelOT BXO!lHLUHe B o rrepaTop L (t, x, D) rrpOH3B0,lI,Hhie H TeM caMhIM orrpa B­ ,lI,aHO CBe,lI,e1me 33.ll3lJH (1), (2) K HHTe rpa JibHOMY ypaBHeHHIO (10). B CHJiy HHTerpa JibHOf0 ypaB HeHHH llJIH p e30JibBeHTbl l R. {t, ., x, s) = K (t, 1:, x , s) + S dj3 SK (t, 13, x , y) R (13, -o, y, s) (y")"0dy ;a "' (17) HMeeM LZ = LG + R"'+ LG* R = - K - K* R + R = 0 T. e . Z (t, 't', x, s)­ q:>ytt.naMeHTaJibHa51 MaTpwua p eweHHH 3aAa'-IH Kourn (I), (2). Teo p e M a. llycmb cucme1,w (l) paBHOM.epHo B-napa6011.u'lecKO.JL B c11.oe fi = [O, TJ X EJ, KOfJc/J[puu,ueHmbt A,. (t, x) nenpepblBHbt no t, npu'le.M. paBHO­ Atep1-t0 om1iocume11.b1w x u A,. E c<w,> (II), A 2ffi0 (t) < oo npu I k I = 2b, a npu I k I< 2b A,. E c<w,) (11), Awl (t) < 00. ToziJa OIi.fl 11.106btx cp EC(£;;), f E c<w,> (II) peutenue saaa<1u (1), (2) on pe­ iJe11.Remcfl cpopMy11.ou (1 5) u cnpaeeiJ11.uBbl ou,en,w JSSN 0041-6053. Jl1'p. Mar. :HCypH., 1992, r. 44, M l 137 fkj k ' k· .., ( - 2b I t I ) I DK,B,.•u (!, x) I< C t ((p c + I '°! , I k I< 2b, (18) I AxD!:B;:u (t, x) I< C [Fo (I Ax I)+ Fl (I A x I) -j- I Ax I (t- .r1i2b] X X t-l (I fP le + If lffi ), I k I = 2b. t (19) I•' k" JI.AR npoU380AbHbtX D;,Bx•Z (t, i:, x , 1;), I k I< 2b, BblnOAHfLetnCH HepaeeHcmeo (8) u nv+2b I AxD!:B;;;z (t, 't, x, 1;) I< C (t < .)- - 21-, - [Fo (I Ax I)+ Fl (I Ax I)+ + I Ax I (t _ 't)-1/2bl r~: (e-clx~x- ;' lq + e-cl~~'lq). (20) Ec11u nIO/lb!W Awo (t) < 00 U <p E c<ffio) (£;;), mo pewe,we aaiJattu !(OlUU onpeiJe,zHemcft uHmeipa,zaAtu Cmu11mbeca c Mepoii Eopellfl t u(t,x) = ~- P (t,x; O,d;)<p(1;)(1;")"• + S 5 P(t,x; d11,d1;)f(-c,1;)(1;")"0 (21) E+ 0 E+ ll n u cnpaeeiJ11uebt ou,eHKU euaa (18) , ( I 9) . 3aMeTHM, 4TO noc-rpoe1rne peweirnH a a11ne (21), a Tairn<e BbIBO.ll. HepaaeHGTB ( 19) H (20) npoBO)l.HTCH c IlOMOW.bIO npHeMa 3. Xonq)a [2]. I. E!iiiJeAbAtaH C. D.. napa60.rnqccK11e rnCTeMbL - M. : Hayirn, 1964.- 4·13 C. 2. Mamuii•tyK M. H ., 31tiJe,ib,1taH C. I1 . 0 qiy11 l iaMe11TaJiblibIX pem e,nrnx 11 3a.ua<Ie Kow11 .nmr napa60.1ll'ICCKIIX CMCTC M, 1(03(pcjJHLU1ellTbl 1rnroµ1,1x Yil.OB,1CTBO[J5!10T YCJIOBHIO Llmrn I I Tp. ceM. no c!iyH1<1ut011. miamBy.- BoµoHe;K, 1967.- Bhrn. 9.- C. 54-83. 3 . M ami31lll' lljk' ,H. H. (f)yHJlaMC!lT3,1bllb!e pem e111rn napa60JIH'ICCKH X CHCTeM C pa3 pbIBHblMH KO· 3Cjxpuu11e n ra~111 11 HX n p 11~1eHe11 11 rr K KpaeBbIM ·1ana 4 aM. II II .Lln:pcj)epe1m. y p3BHeHH5!.- 1975. - 11 , J\J<) 7.- C. 1293-1303. 4. Mamutt•tyK M. 11. 3aJ{a4a OBTHMH33UH11 H 33)13'!3 C l!O!!Bfl)l(H0fl rp3HHUeii ,UJI5I nap360JIH'!eC• KHX ypastte1rnii / I HeJIHHeiiu. r paHH'lHbie 33,l\a<IH.- 1990.- Bbrn. 2.- C. 78-84. n o,,Y'1eao 16,01.91 0127 0128 0129 0130 копия
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spelling umjimathkievua-article-78052023-09-14T12:03:56Z One method for solution of the Cauchy problem for singular parabolic equations Об одном методе решения задачи Коши для сингулярных параболических уравнений Matiichuk , M. I. Матийчук , М. И. We consider a system of parabolic type with singular coefficients on boundary hyperplanes. We reduce the solution of the Cauchy problem to an integral equation and determine the fundamental solution as the kernel of the inverse operator of the Cauchy problem. Рассматривается система параболического типа с сингулярными коэффициентами на граничных гиперплоскостях. Решение задачи Коши сводится к интегральному уравнению и фундаментальное решение определяется как ядро обратного оператора задачи Коши. Розглядається система параболічного типу з сингулярними коефіцієнтами на граничних гіперплощинах. Розв’язування задачі Коші зводиться до інтегрального рівняння і фундаментальний розв’язок визначається як ядро оберненого оператора задачі Коші. Institute of Mathematics, NAS of Ukraine 1992-02-04 Article Article application/pdf https://umj.imath.kiev.ua/index.php/umj/article/view/7805 Ukrains’kyi Matematychnyi Zhurnal; Vol. 44 No. 1 (1992); 135-138 Український математичний журнал; Том 44 № 1 (1992); 135-138 1027-3190 rus https://umj.imath.kiev.ua/index.php/umj/article/view/7805/9472 Copyright (c) 1992 M. I. Matiichuk
spellingShingle Matiichuk , M. I.
Матийчук , М. И.
One method for solution of the Cauchy problem for singular parabolic equations
title One method for solution of the Cauchy problem for singular parabolic equations
title_alt Об одном методе решения задачи Коши для сингулярных параболических уравнений
title_full One method for solution of the Cauchy problem for singular parabolic equations
title_fullStr One method for solution of the Cauchy problem for singular parabolic equations
title_full_unstemmed One method for solution of the Cauchy problem for singular parabolic equations
title_short One method for solution of the Cauchy problem for singular parabolic equations
title_sort one method for solution of the cauchy problem for singular parabolic equations
url https://umj.imath.kiev.ua/index.php/umj/article/view/7805
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