Warianty tytułu
Języki publikacji
Abstrakty
In this paper we prove an existence theorem for the Hammerstein integral equation
$x(t) = p(t) + λ ∫_I K(t,s)f(s,x(s))ds$, where the integral is taken in the sense of Pettis. In this theorem continuity assumptions for f are replaced by weak sequential continuity and the compactness condition is expressed in terms of the measures of weak noncompactness. Our equation is considered in general Banach spaces.
$x(t) = p(t) + λ ∫_I K(t,s)f(s,x(s))ds$, where the integral is taken in the sense of Pettis. In this theorem continuity assumptions for f are replaced by weak sequential continuity and the compactness condition is expressed in terms of the measures of weak noncompactness. Our equation is considered in general Banach spaces.
Rocznik
Tom
Numer
Strony
171-177
Opis fizyczny
Daty
wydano
1996
Twórcy
autor
- Faculty of Mathematics and Computer Science, A. Mickiewicz University, Matejki 48/49, 60-769 Poznań, Poland
autor
- Faculty of Mathematics and Computer Science, A. Mickiewicz University, Matejki 48/49, 60-769 Poznań, Poland
Bibliografia
- [1] J. Appell, Implicit functions, nonlinear integral equations, and the measure of noncompactness of the superposition operator, J. Math. Anal. Appl. 83 (1981), 251-263.
- [2] J. Appell, Misure di non compattezza in spazi ideali, Rend. Sc. Instituto Lombardo A 119 (1985), 175-186.
- [3] O. Arino, S. Gautier and J. P. Penot, A fixed point theorem for sequentially continuous mappings with application to ordinary differential equations, Funkcialaj Ekvac. 27 (1984), 273-279.
- [4] J.M. Ball, Weak continuity properties of mappings and semi-groups Proc. Royal Soc. Edinbourgh Sect. A 72 (1979), 275-280.
- [5] M. Cichoń, On bounded weak solutions of a nonlinear differential equation in Banach spaces, Functiones et Approximatio 21 (1992), 27-35.
- [6] M. Cichoń, Weak solutions of differential equations in Banach spaces, Discuss. Math. Diff. Incl. 15 (1995), 5-14.
- [7] J. Diestel and J.J. Uhl Jr., Vector Measures, Math. Surveys, Amer. Math. Soc., Providence, Rhode Island (15) (1977).
- [8] I. Kubiaczyk, On a fixed point for weakly sequentially continuous mappings, Discuss. Math. - Diff. Incl. 15 (1995), 15-20.
- [9] A.R. Mitchell and Ch. Smith, An existence theorem for weak solutions of differential equations in Banach spaces, in: 'Nonlinear Equations in Abstract Spaces', ed. V. Lakshmikantham, Academic Press (1978), 387-404.
- [10] H. Mönch, Boundary value problems for nonlinear ordinary differential equations of second order in Banach spaces, Nonlin. Anal. Th. Meth. Appl. 4 (1980), 985-999.
- [11] D. O'Regan, Integral equations in reflexive Banach spaces and the weak topologies, Proc. AMS 124 (1996), 607-614.
- [12] S. Szufla, On the application of measure of noncompactness to existence theorems, Rend Sem. Mat. Univ. Padova, 75 (1986), 1-14.
- [13] S. Szufla, On the Hammerstein integral equation with weakly singular kernel, Funkcialaj Ekvac. 34 (1991), 279-285.
- [14] M. Talagrand, Pettis integral and measure theory, Memoires Amer. Math. Soc., Amer. Math. Soc., Providence, Rhode Island 51 (307) (1984).
Typ dokumentu
Bibliografia
Identyfikatory
Identyfikator YADDA
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