Gilbert fazosida hosilali kvadratur formulani optimal koeffisientlarini topish
Keywords:
Gilbert fazosi, kvadratur formula, optimal koeffisient, funksional analiz, ortogonal proyeksiya, variatsion usul, integralni taxminiy hisoblashAbstract
Mazkur ishda Gilbert fazosida hosilali kvadratur formulalarning optimal koeffisientlarini topish masalasi o‘rganilgan. Tadqiqotning maqsadi — integralni taxminiy hisoblashda yuzaga keladigan xatolikni minimal darajaga tushiruvchi kvadratur formulani qurish va uning optimal koeffisientlarini aniqlashdan iborat. Buning uchun Gilbert fazosining ichki ko‘paytma va normasi asosida funksional analiz usullari qo‘llanildi. Optimal koeffisientlarni topishda ortogonal proyeksiya prinsipi hamda variatsion yondashuvdan foydalanildi. Olingan natijalar integralni hisoblashda aniqlikni oshirish bilan birga, raqamli usullarda hisoblash barqarorligini ta’minladi. Tadqiqot natijasida hosilali kvadratur formulalar uchun analitik ko‘rinishda optimal koeffisientlar ifodalari keltirildi va ularning amaliy ahamiyati matematik modellashtirish hamda hisoblash fizikasida namoyon etildi.
References
1. J.H. Ahlberg, E.N. Nilson, J.L. Walsh, The Theory of Splines and Their Applications, Academic Press, New York -- London, 1967.
2. I. Babuv{s}ka, Optimal quadrature formulas (Russian), Dokladi Akad. Nauk SSSR. 149 (1963) 227--229.
3. P. Blaga, Gh. Coman, Some problems on optimal quadrature, Stud. Univ. Babec{s}-Bolyai Math. 52, no. 4 (2007) 21--44.
4. T. Catinac{s}, Gh. Coman, Optimal quadrature formulas based on the -function method, Stud. Univ. Babec{s}-Bolyai Math. 51, no. 1 (2006) 49--64.
5. A.R. Hayotov, G.V. Milovanovi'{c}, Kh.M. Shadimetov, On an optimal quadrature formula in the sense of Sard. Numerical Algorithms, v.57, no. 4, (2011) 487-510.
6. A.R. Hayotov, G.V. Milovanovi'{c}, Kh.M. Shadimetov, Optimal quadratures in the sense of Sard in a Hilbert space. Applied Mathematics and Computation, 259 (2015) 637-653.
7. P. K"{o}hler, On the weights of Sard's quadrature formulas, Calcolo, 25 (1988) 169--186.
8. F. Lanzara, On optimal quadrature formulae, J. Ineq. Appl. 5 (2000) 201--225.
9. C.A. Micchelli, Best quadrature formulas at equally spaced nodes, J. Math. Anal. Appl. 47 (1974) 232-249.
10. S.M. Nikol'skii, Quadrature Formulas, Nauka, Moscow, 1988.(in Russian).
11. A. Sard, Best approximate integration formulas; best approximation formulas, Amer. J. Math. 71 (1949) 80--91.
12. I.J. Schoenberg, On monosplines of least deviation and best quadrature formulae, J. Soc. Indust. Appl. Math. Ser. B Numer. Anal. 2 (1965) 144-170.
13. I.J. Schoenberg, S.D. Silliman, On semicardinal quadrature formulae. Math. Comp. 28 (1974) 483--497.
14. Kh.M. Shadimetov, A.R. Hayotov, Construction of the discrete analogue of the differential operator , Uzbek mathematical journal, 2004, no.2, pp. 85-95.
15. Kh.M. Shadimetov, A.R. Hayotov, Optimal quadrature formulas with positive coefficients in space, J. Comput. Appl. Math. 235 (2011) 1114--1128.
16. Kh.M. Shadimetov, A.R. Hayotov, Optimal quadrature for-mulas in the sense of Sard in space, Calcolo 51 (2014) 211--243.
17. Kh.M. Shadimetov, A.R. Hayotov, F.A. Nuraliev, On an optimal quadrature formula in Sobolev space , J. Comput. Appl. Math. 243 (2013) 91--112.
18. Kh.M. Shadimetov, A.R. Hayotov, F.A. Nuraliev, Optimal quadrature formulas of Euler-Maclaurin type, Applied Mathematics and Computation 276 (2016) 340--355.
19. Kh.M. Shadimetov, F.A. Nuraliev, Optimal formulas of numerical integration with derivatives in Sobolev space, Journal of Siberian Federal University. Math. and Phys. 2018, 11 (6) 764-775.
20. S.L. Sobolev, The coefficients of optimal quadrature formulas, Selected Works of S.L. Sobolev, Springer, (2006) 561--566.
21. S.L. Sobolev, Introduction to the Theory of Cubature Formulas (Russian), Nauka, Moscow, 1974.
22. S.L. Sobolev, V.L. Vaskevich, The Theory of Cubature Formulas, Kluwer Academic Publishers Group, Dordrecht, 1997.
23. F.Ya. Zagirova, On construction of optimal quadrature formulas with equal spaced nodes (Russian). Novosibirsk (1982), 28 p. (Preprint No. 25, Institute of Mathematics SD of AS of USSR)
24. A.A. Zhensikbaev, Monosplines of minimal norm and the best quadrature formulas, Uspekhi Mat. Nauk. 1981, 36, 107--159.


