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Found 46 Documents (Results 1–46)

Asymptotic behaviour of the eigenvalues of a boundary-value problem for a second-order elliptic operator-differential equation. (Russian, English) Zbl 1120.34042

Ukr. Mat. Zh. 58, No. 8, 1146-1152 (2006); translation in Ukr. Math. J. 58, No. 8, 1298-1306 (2006).
MSC:  34G10 34L20 47E05
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Approximation of classes of \(\overline{\psi}\)-integrals of periodic functions of many variables by rectangular linear means of their Fourier series. (Russian, English) Zbl 1100.42006

Ukr. Mat. Zh. 57, No. 4, 564-570 (2005); translation in Ukr. Math. J. 57, No. 4, 678-685 (2005).
MSC:  42B05 42A10
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Construction of asymptotic solutions of linear systems of differential equations with two small parameters. (Ukrainian, English) Zbl 1079.34043

Ukr. Mat. Zh. 55, No. 7, 961-976 (2003); translation in Ukr. Math. J. 55, No. 7, 1163-1180 (2003).
MSC:  34E05 34C20 34E10
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On periodic solutions of degenerate singularly perturbed linear systems with multiple elementary divisor. (Ukrainian. English summary) Zbl 1035.34033

Ukr. Mat. Zh. 54, No. 10, 1403-1415 (2002); translation in Ukr. Math. J. 54, No. 10, 1698-1714 (2002).
MSC:  34C25 34E10
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Asymptotics of solutions of the Sturm-Liouville equation with respect to a parameter. (English. Russian original) Zbl 0999.34051

Ukr. Math. J. 53, No. 6, 866-885 (2001); translation from Ukr. Mat. Zh. 53, No. 6, 742-757 (2001).
MSC:  34D05 34B24
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On the best \(L_1\)-approximations of functional classes by splines under restrictions imposed on their derivatives. (English. Russian original) Zbl 0957.41020

Ukr. Math. J. 51, No. 4, 481-491 (1999); translation from Ukr. Mat. Zh. 51, No. 4, 435-444 (1999).
MSC:  41A50 41A15
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Bogolyubov averaging and procedures of normalization in nonlinear mechanics. III. (English. Ukrainian original) Zbl 0946.34043

Ukr. Math. J. 46, No. 12, 1803-1826 (1994); translation from Ukr. Mat. Zh. 46, No. 12, 1627-1646 (1994).
MSC:  34C29 34E10
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