Now showing items 21-30 of 69
Existence criteria for singular initial value problems with sign changing nonlinearities
(Hindawi Limited, 2001-01-01)
A general existence theory is presented for initial value problems where our nonlinearity may be singular in its dependent variable and may also change sign.
Positive solutions of singular problems with sign changing carathéodory nonlinearities depending on x′
(Elsevier BV, 2003-03-01)
A leray-schauder alternative for weakly-strongly sequentially continuous weakly compact maps
(Springer Nature, 2005-01-01)
A new applicable Leray-Schauder alternative is presented for weakly-strongly sequentially continuous maps. This result is then used to establish a general existence principle for operator equations.
Oscillation criteria for second-order nonlinear neutral delay dynamic equations
(Elsevier BV, 2004-12-01)
General existence principles for nonlocal boundary value problems withφ-laplacian and their applications
(Hindawi Limited, 2006-01-01)
Multiplicity of positive periodic solutions to second order differential equations
(Cambridge University Press (CUP), 2006-04-01)
In this paper, we study the existence of positive periodic solutions to the equation x" = f (t, x). It is proved that such a equation has more than one positive periodic solution when the nonlinearity changes sign. ...
Existence results for first and second order semilinear impulsive differential inclusions
(Uniwersytet Mikolaja Kopernika/Nicolaus Copernicus University, 2005-09-01)
In this paper we prove existence results for first and second order semilinear impulsive differential inclusions in Banach spaces.
Fixed point theory for k–car sets
(Elsevier BV, 2000-11-01)
Singular problems modelling phenomena in the theory of pseudoplastic fluids
(Cambridge University Press (CUP), 2003-10-01)
Existence criteria are presented for nonlinear singular initial and boundary value problems. In particular our theory includes a problem arising in the theory of pseudoplastic fluids.