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Discrete systems on infinite intervals
(Elsevier BV, 1998-05-01)
We study superlinear boundary value problems for a discrete system which in particular includes the prototype equation x(k + 1) = f(k,x(k)), equations with finite as well as infinite delays, equations of neutral type, and ...
A fixed-point approach for nonlinear discrete boundary value problems
(Elsevier BV, 1998-11-01)
Positive solutions to singular initial value problems with sign changing nonlinearities
(Elsevier BV, 1998-08-01)
Existence principles for nonresonant operator and integral equations
(Elsevier BV, 1998-05-01)
Existence principles for nonresonant, nonlinear, operator equations are presented in this paper.
Existence principles for nonlinear resonant operator and integral equations
(Elsevier BV, 1998-10-01)
New fixed-points results for 1-set contractive set valued maps
(Elsevier BV, 1998-02-01)
New fixed-point theorems and random fixed-point theorems are presented for multivalued maps.
Singular differential equations with linear and nonlinear boundary conditions
(Elsevier BV, 1998-02-01)
Existence results are established for the singular equation y " + f(t, y) = 0, where f is not a Caratheodory function. Our nonlinearity f is allowed to change sign.
Fixed points for set-valued mappings in locally convex linear topological spaces
(Elsevier BV, 1998-07-01)
Approximation of solutions of nonlinear operator equation on the half line
(Elsevier BV, 1998-05-01)
This paper discusses the solvability and approximation of operator equations on the half line.
Fixed-point theory for multivalued mappings in completely regular topological vector spaces
(Elsevier BV, 1998-11-01)