Valeri Obukhovskii

Prof. Dr. Valeri Obukhovskii


Research Focus & Metrics

Academic Career Length

31Years (1996-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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23 May 2015 in Fractional Calculus and Applied Analysis
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TKTran Dinh Ke
Tran Dinh Ke
NLNguyen Van Loi
Nguyen Van Loi
VOValeri Obukhovskii
Valeri Obukhovskii

18 March 2014 in Nonlinear Differential Equations and Applications NoDEA
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IBIrene Benedetti
Irene Benedetti
VOValeri Obukhovskii
Valeri Obukhovskii
Valentina TaddeiValentina Taddei
Valentina Taddei
In this paper we study the controllability for a class of semilinear differential inclusions in Banach spaces. Since we assume the regularity of the nonlinear part with respect to the weak topology, we do not require the compactness of the evolution operator generated by the linear part. As well we are not posing any conditions on the multivalued nonlinearity expressed in terms of measures of noncompactness. We are considering the usual assumption on the controllability of the associated linear problem. Notice that, in infinite dimensional spaces, the above mentioned compactness of the evolution operator and linear controllability condition are in contradiction with each other. We suppose that the nonlinear term has convex, closed, bounded values and a weakly sequentially closed graph when restricted to its second argument. This regularity setting allows us to solve controllability problem under various growth conditions. As application, a controllability result for hyperbolic integro-differential equations and inclusions is obtained. In particular, we consider controllability of a system arising in a model of nonlocal spatial population dispersal and a system governed by the second order one-dimensional telegraph equation.

1 December 2014 in Journal of Fixed Point Theory and Applications
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VZVictor Zvyagin
Victor Zvyagin
VOValeri Obukhovskii
Valeri Obukhovskii
AZAndrey Zvyagin
Andrey Zvyagin

20 December 2017 in Fractional Calculus and Applied Analysis
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IBIrene Benedetti
Irene Benedetti
VOValeri Obukhovskii
Valeri Obukhovskii
Valentina TaddeiValentina Taddei
Valentina Taddei

8 December 2011 in Differential Equations and Dynamical Systems
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TKTran Dinh Ke
Tran Dinh Ke
VOValeri Obukhovskii
Valeri Obukhovskii
NWNgai-Ching Wong
Ngai-Ching Wong
JYJen-Chih Yao
Jen-Chih Yao

10 January 2021 in Mathematics
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MKMikhail A. Kamenskii
Mikhail A. Kamenskii
VOValeri Obukhovskii
Valeri Obukhovskii
GPGarik Petrosyan
Garik Petrosyan
Jen-Chih YaoJen-Chih Yao
Jen-Chih Yao
We obtained results on the existence and uniqueness of a mild solution for a fractional-order semi-linear differential inclusion in a Hilbert space whose right-hand side contains an unbounded linear monotone operator and a Carathéodory-type multivalued nonlinearity satisfying some monotonicity condition in the phase variables. We used the Yosida approximations of the linear part of the inclusion, the method of a priori estimates of solutions, and the topological degree method for condensing vector fields. As an example, we considered the existence and uniqueness of a solution to the Cauchy problem for a system governed by a perturbed subdifferential inclusion of a fractional diffusion type.