Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Vasile Lupulescu"'
Autor:
Vasile Lupulescu, Donal O'Regan
Publikováno v:
Surveys in Mathematics and its Applications, Vol 14 (2019), Pp 287-305 (2019)
In this paper we propose a new concept of differentiability for interval-valued functions. This concept is based on the properties of the Hausdorff-Pompeiu metric and avoids using the generalized Hukuhara difference.
Externí odkaz:
https://doaj.org/article/402ce3e118ca444b8dba8a190dae7f72
Autor:
Vasile Lupulescu
Publikováno v:
Surveys in Mathematics and its Applications, Vol 15 (2020), Pp 471-472 (2020)
In Memoriam Professor Constantin Buse (October 19, 1960 - February 4, 2020)
Externí odkaz:
https://doaj.org/article/f17a6838e8d94a28b40ae4feac235720
Publikováno v:
Symmetry, Vol 12, Iss 1, p 48 (2019)
In this paper, we establish sufficient conditions for the existence of mild solutions for certain impulsive evolution differential equations with causal operators in separable Banach spaces. We rely on the existence of mild solutions for the strongly
Externí odkaz:
https://doaj.org/article/c9a6f9af8f8342c48c150a29ea850f50
Publikováno v:
Opuscula Mathematica, Vol 34, Iss 4, Pp 813-825 (2014)
In this paper, an existence result for a random fractional differential equation is established under a Carathéodory condition. Existence results for extremal random solutions are also proved. Finally, an existence and uniqueness result is given
Externí odkaz:
https://doaj.org/article/d2e73d5834694e8f990ec4d0e53212a8
Autor:
Sadia Arshad, Vasile Lupulescu
Publikováno v:
Le Matematiche, Vol 68, Iss 1, Pp 53-64 (2013)
The aim of this paper is to establish the existence of solutions and some properties of solutions set for a class of functional differential equations with causal operator under assumption that the equation satisfies the Carathéodory type condition.
Externí odkaz:
https://doaj.org/article/b3c55481fe5245599673f90d854d98e9
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2013, Iss 5, Pp 1-35 (2013)
This paper deals with the resolvent, asymptotic stability and boundedness of the solution of time-varying Volterra integro-dynamic system on time scales in which the coefficient matrix is not necessarily stable. We generalize at time scale some known
Externí odkaz:
https://doaj.org/article/126f2d0032734f7a92e0936a6f971eda
Autor:
Vasile Lupulescu, Cristina Lungan
Publikováno v:
Opuscula Mathematica, Vol 33, Iss 2, Pp 323-335 (2013)
In this paper, we present the existence and uniqueness of random solution of a random integral equation of Volterra type on time scales. We also study the asymptotic properties of the unique random solution.
Externí odkaz:
https://doaj.org/article/5bffa35dda984fc2a11e0fe97862a5c0
Autor:
Cristina Lungan, Vasile Lupulescu
Publikováno v:
Electronic Journal of Differential Equations, Vol 2012, Iss 86,, Pp 1-14 (2012)
The purpose of this paper is to prove the existence and uniqueness of solution for random dynamic systems on time scales.
Externí odkaz:
https://doaj.org/article/1fdd12993863476882daec92e57a1f53
Autor:
Vasile Lupulescu, Awais Younus
Publikováno v:
Electronic Journal of Qualitative Theory of Differential Equations, Vol 2011, Iss 95, Pp 1-30 (2011)
The aim of this paper is to study the controllability and observability for a class of linear time-varying impulsive control systems on time scales. Sufficient and necessary conditions for state controllability and state observability of such systems
Externí odkaz:
https://doaj.org/article/ba058614da04477ca82aa65f420e35c6
Autor:
Sadia Arshad, Vasile Lupulescu
Publikováno v:
Electronic Journal of Differential Equations, Vol 2011, Iss 34,, Pp 1-8 (2011)
In this paper we study the existence and uniqueness of the solution for a class of fractional differential equation with fuzzy initial value. The fractional derivatives are considered in the Riemann-Liouville sense.
Externí odkaz:
https://doaj.org/article/0fd50236c0a64ee5a7772ad98dfd258a