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On boundary value problems for systems of nonlinear generalized ordinary differential equations

Malkhaz Ashordia (2017)

Czechoslovak Mathematical Journal

A general theorem (principle of a priori boundedness) on solvability of the boundary value problem d x = d A ( t ) · f ( t , x ) , h ( x ) = 0 is established, where f : [ a , b ] × n n is a vector-function belonging to the Carathéodory class corresponding to the matrix-function A : [ a , b ] n × n with bounded total variation components, and h : BV s ( [ a , b ] , n ) n is a continuous operator. Basing on the mentioned principle of a priori boundedness, effective criteria are obtained for the solvability of the system under the condition x ( t 1 ( x ) ) = ( x ) · x ( t 2 ( x ) ) + c 0 , where t i : BV s ( [ a , b ] , n ) [ a , b ] ...

On boundary value problems of second order differential inclusions

Bapur Chandra Dhage (2004)

Discussiones Mathematicae, Differential Inclusions, Control and Optimization

This paper presents sufficient conditions for the existence of solutions to boundary-value problems of second order multi-valued differential inclusions. The existence of extremal solutions is also obtained under certain monotonicity conditions.

On bounded nonoscillatory solutions of third-order nonlinear differential equations

Ivan Mojsej, Alena Tartaľová (2009)

Open Mathematics

This paper is concerned with the asymptotic behavior of solutions of nonlinear differential equations of the third-order with quasiderivatives. We give the necessary and sufficient conditions guaranteeing the existence of bounded nonoscillatory solutions. Sufficient conditions are proved via a topological approach based on the Banach fixed point theorem.

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