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Found 171 Documents (Results 1–100)

Methods of solution of boundary-value problems for weakly nonlinear integro-differential equations with parameters and restrictions. (Ukrainian, English) Zbl 1224.34206

Ukr. Mat. Zh. 61, No. 5, 672-679 (2009); translation in Ukr. Math. J. 61, No. 5, 801-809 (2009).
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Necessary and sufficient conditions of optimality in the control problems with fuzzy parameters. (Russian, English) Zbl 1224.49034

Ukr. Mat. Zh. 61, No. 3, 384-390 (2009); translation in Ukr. Math. J. 61, No. 3, 457-466 (2009).
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Averaging of initial-value and multipoint problems for oscillation systems with slowly varying frequencies and deviated argument. (Ukrainian, English) Zbl 1150.34611

Ukr. Mat. Zh. 59, No. 3, 412-430 (2007); translation in Ukr. Math. J. 59, No. 3, 459-483 (2007).
MSC:  34K99 34K10
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On the behaviour of solutions of linear functional differential equations with constant coefficients and linearly transformed argument in neighbourhoods of singular points. (Ukrainian, English) Zbl 1102.34050

Ukr. Mat. Zh. 57, No. 12, 1668-1676 (2005); translation in Ukr. Math. J. 57, No. 12, 1957-1967 (2005).
MSC:  34K06 34K25
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Exact solvability conditions for the Cauchy problem for systems of first-order linear functional-differential equations determined by \((\sigma_1,\sigma_2,\dots,\sigma_n;\tau)\)-positive operators. (Russian, English) Zbl 1079.34051

Ukr. Mat. Zh. 55, No. 11, 1541-1568 (2003); translation in Ukr. Math. J. 55, No. 11, 1853-1884 (2003).
MSC:  34K06
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Conditions for the existence of nonoscillatory solutions of nonlinear differential equations with delay and impulsive perturbation in Banach space. (Ukrainian, English) Zbl 1042.34102

Ukr. Mat. Zh. 55, No. 6, 790-798 (2003); translation in Ukr. Math. J. 55, No. 6, 956-965 (2003).
MSC:  34K30 34K11 34K45
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On construction and growth of solutions of degenerate functional-differential equations of neutral type. (Russian. English summary) Zbl 1035.34091

Ukr. Mat. Zh. 54, No. 11, 1443-1451 (2002); translation in Ukr. Math. J. 54, No. 11, 1749-1759 (2002).
MSC:  34K30 34K40 35R10
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On global solutions to systems of nonlinear functional-differential equations with deviations of the argument depending on unknown functions. (English. Russian original) Zbl 1037.34062

Ukr. Math. J. 54, No. 3, 496-503 (2002); translation from Ukr. Mat. Zh. 54, No. 3, 402-407 (2002).
MSC:  34K12
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On the existence of periodic solutions to certain classes of systems of differential equations with random pulse influence. (English. Russian original) Zbl 0999.34058

Ukr. Math. J. 53, No. 8, 1266-1289 (2001); translation from Ukr. Mat. Zh. 53, No. 8, 1061-1079 (2001).
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Controllable pulse influence in games with fixed termination time. (English. Russian original) Zbl 0973.91010

Ukr. Math. J. 52, No. 8, 1274-1281 (2000); translation from Ukr. Mat. Zh. 52, No. 8, 1112-1118 (2000).
MSC:  91A23 49N70 34K45
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Criteria for the asymptotic stability of solutions of dynamical systems. (English. Russian original) Zbl 0974.39006

Ukr. Math. J. 52, No. 12, 1942-1948 (2000); translation from Ukr. Mat. Zh. 52, No. 12, 1702-1707 (2000).
MSC:  39A11 34K50 39A12 93E15
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On analytic solutions to nonlinear differential functional equations with nonlinear deviations of arguments. (English. Ukrainian original) Zbl 0938.34060

Ukr. Math. J. 51, No. 2, 261-268 (1999); translation from Ukr. Mat. Zh. 51, No. 2, 234-240 (1999).
MSC:  34K05 34K12
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Discrete dynamical systems with invariant asymptotically stable toroidal manifold. (English. Russian original) Zbl 0940.34063

Ukr. Math. J. 51, No. 4, 518-524 (1999); translation from Ukr. Mat. Zh. 51, No. 4, 466-471 (1999).
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Direct methods for the approximate solution of operator equations with nonzero kernels. (English. Russian original) Zbl 0941.34074

Ukr. Math. J. 50, No. 9, 1376-1388 (1998); translation from Ukr. Mat. Zh. 50, No. 9, 1202-1213 (1998).
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Numerical-analytic method for the investigation of multipoint boundary value problems for systems of differential equations with transformed argument. (English. Ukrainian original) Zbl 0944.34055

Ukr. Math. J. 50, No. 11, 1805-1810 (1998); translation from Ukr. Mat. Zh. 50, No. 11, 1581-1584 (1998).
MSC:  34K10 34A45
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The theory of the numerical-analytic method: Achievements and new trends of development. III. (English. Russian original) Zbl 0934.34034

Ukr. Math. J. 50, No. 7, 1091-1114 (1998); translation from Ukr. Mat. Zh. 50, No. 7, 960-979 (1998).
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The existence of a bifurcation value of a parameter of a system of differential equations with deviating argument. (English. Russian original) Zbl 0932.34074

Ukr. Math. J. 49, No. 6, 894-900 (1997); translation from Ukr. Mat. Zh. 49, No. 6, 799-806 (1997).
MSC:  34K18 34C23 34K13
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Approximation of a bounded solution to a linear difference equation on \(Z^2\) by solutions to corresponding boundary-value problems in a Banach space. (English. Russian original) Zbl 0937.34063

Ukr. Math. J. 47, No. 4, 622-628 (1995); translation from Ukr. Mat. Zh. 47, No. 4, 535-541 (1995).
MSC:  34K30 34K10
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Asymptotics of the fundamental system of solutions to a linear functional-differential equation with respect to a parameter. (English. Russian original) Zbl 0938.34070

Ukr. Math. J. 47, No. 6, 936-962 (1995); translation from Ukr. Mat. Zh. 47, No. 6, 811-836 (1995).
MSC:  34K30 34K25 34K05
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Solutions of systems of nonlinear functional-differential equations bounded in the entire real axis and their properties. (English. Russian original) Zbl 0843.34073

Ukr. Math. J. 46, No. 6, 799-811 (1994); translation from Ukr. Mat. Zh. 46, No. 6, 737-747 (1994).
MSC:  34K99 34C11
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On the oscillation and asymptotic behavior of the solutions of a certain system of differential-functional equations of neutral type. (English. Russian original) Zbl 0783.34055

Ukr. Math. J. 44, No. 8, 945-949 (1992); translation from Ukr. Mat. Zh. 44, No. 8, 1044-1049 (1992).
MSC:  34K99 34K40 34C10
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