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Solvability of singular second order m-point boundary value problems
(Elsevier BV, 2005-01-01)
Constant-sign periodic and almost periodic solutions of a system of difference equations
(Elsevier BV, 2005-11-01)
Singular positone and semipositone boundary value problems of second order delay differential equations
(Institute of Mathematics, Czech Academy of Sciences, 2005-06-01)
In this paper we present some new existence results for singular positone and semipositone boundary value problems of second order delay differential equations. Throughout our nonlinearity may be singular in its dependent ...
Compression–expansion fixed point theorem in two norms and applications
(Elsevier BV, 2005-09-01)