PL
 |
EN
Ten serwis zostanie wyłączony 2025-02-11.
Nowa wersja platformy, zawierająca wyłącznie zasoby pełnotekstowe, jest już dostępna.
Przejdź na https://bibliotekanauki.pl
Preferencje help
Polish version English version Język
Widoczny [Schowaj] Abstrakt
Liczba wyników

Znaleziono wyników: 10

Liczba wyników na stronie
first rewind previous Strona / 1 next fast forward last
Wyniki wyszukiwania
help Sortuj według:

help Ogranicz wyniki do:
first rewind previous Strona / 1 next fast forward last
1
Content available remote On the existence of weak solutions of the Darboux problem for the hyperbolic partial differential equations in Banach spaces
100%
Kubiaczyk I. , Mostafa Ali N.
Fasciculi Mathematici
|
1998
|
tom Nr 28
93-99
EN
In this paper we prove an existence theorem for the hyperbolic partial differential equation zx.y = f(x,y,z,zxy), z(x,O)=o, z(O,y)=O for x,y>O, where Zxy means the second mixed derivative in the weak sence. The continuity of the xy function f is replaced by the weak continuity and the compactness condition is expressed in ternls of the measuresa of weak noncompactness. This paper extends some previous results for our equation.
2
Content available remote Kamenev-type oscillation criteria for hyperbolic delay difference equations
100%
Kubiaczyk I. , Saker S. H.
|
2003
|
tom Vol. 36, nr 1
113--122
EN
Some new oscillation criteria and discrete Kamenev-type oscillation criteria for hyperbolic nonlinear delay difference equations are obtained.
3
Content available remote Oscillation of parabolic delay differential equations with positive and negative coefficients
100%
Kubiaczyk I. , Saker S. H.
Annales Societatis Mathematicae Polonae. Seria 1: Commentationes Mathematicae
|
2002
|
tom [Z] 42(2)
221-236
EN
Some new sufficient conditions for oscillation of the parabolic delay differential equations with positive and negative coefficients are obtained. Our results extend and improve the well known results in the literature.
4
Content available remote The Asymptotic Stability of the Functional-Integral Equation in Banach Spaces
100%
Kubiaczyk I. , Roszak M.
Annales Societatis Mathematicae Polonae. Seria 1: Commentationes Mathematicae
|
2004
|
tom Vol. 44, nr 2
271-277
5
Content available remote Common of fixed point of multivalued mappings without continuity
100%
Kubiaczyk I. , Deshpande B.
Fasciculi Mathematici
|
2007
|
tom Nr 37
19-26
EN
In this paper, we prove a common fixed point theorem for single-valued and multivalued mappings on a metric space using the minimal type commutativity condition. We show that continuity of any mapping is not necessary for the existence of a common fixed point.
6
Content available remote Coincidence point for noncompatible multivalued maps satisfying implicit relation
100%
Kubiaczyk I. , Deshpande B.
|
2006
|
tom Vol. 39, nr 4
855-862
EN
In this paper we prove a common coincidence point theorem for single- valued and multivalued mappings satisfying an implicit relation under the condition of R-weak commutativity on metric spaces.
7
Content available remote On bounded pseudo and weak solutions of a nonlinear differential equation in Banach spaces
100%
Krzyśka S. , Kubiaczyk I.
|
1999
|
tom Vol. 32, nr 2
323-330
EN
In this paper, we prove an existence theorem for bounded pseudo and weak solution of the differential equation . XI(t) = A(t)x(t) + f(t, X(t)) where f(., X(.) ) is Pettis- integrable for each strongly absolutely continuous function X and f(t,.) is weakly-weakly sequentially continuous. We also assume some condition expressed in terms of De Blasi's measure of weak noncompactness.
8
Oscillation of solutions to nonlinear neutral delay differential equations
100%
Saker S. H. , Kubiaczyk I.
Journal of Applied Analysis
|
2002
|
tom Vol. 8, nr 2
261-278
EN
In this paper we shall consider the nonlinear neutral delay differential equations with variable coefficients. Some new sufficient conditions for oscillation of all solutions are obtained. Our results extend and improve some of the well known results in the literature. Some examples are considered to illustrate our main results. The neutral logistic equation with variable coefficients is considered to give some new sufficient conditions for oscillation of all positive solutions about its positive steady state.
9
Content available remote New oscillation ciriteria of first order delay differential equations
100%
Kubiaczyk I. , Saker S. H.
|
2002
|
tom Vol. 35, nr 2
313-324
EN
In this paper we shall consider the first order delay differential equations with variable coefficients. Some new sufficient conditions for oscillation of all solutions are obtained. Our results based on the analysis of the generalized charachterestic equation. The results partially improve some previously known results in the literature. Some examples are considered to illustrate our main results.
10
Content available remote Existence of solutions of the dynamic Cauchy problem in Banach spaces
80%
Cichoń M. , Kubiaczyk I. , Sikorska-Nowak A. , Yantir A.
|
2012
|
tom Vol. 45, nr 3
561-573
EN
In this paper we obtain the existence of solutions and Carathéodory type solutions of the dynamic Cauchy problem in Banach spaces for functions defined on time scales (…), where f is continuous or f satisfies Carathéodory conditions and some conditions expressed in terms of measures of noncompactness. The Mönch fixed point theorem is used to prove the main result, which extends these obtained for real valued functions.
first rewind previous Strona / 1 next fast forward last
JavaScript jest wyłączony w Twojej przeglądarce internetowej. Włącz go, a następnie odśwież stronę, aby móc w pełni z niej korzystać.