## Search

Now showing items 1-10 of 33

#### The set of solutions for abstract volterra equations in lp([0, a], rm)

(Elsevier BV, 1999-11-01)

#### Boundary value problems for discrete equations

(Elsevier BV, 1997-07-01)

Two existence results are presented for second-order discrete boundary value problems. The first result is based on the notion of upper and lower solutions and the second result is based on the discrete Gelfand problem.

#### A general existence principle for strong solutions to the dirichlet problem for the equation δ u + f(t, u) = 0

(Elsevier BV, 1997-05-01)

An existence principle is established for Delta u + f(t, u) = 0 on Omega, u = 0 on partial derivative Omega. Our theory relies on a fixed point result for weakly sequentially continuous and weakly compact maps.

#### Fixed-point theory for the sum of two operators

(Elsevier BV, 1996-01-01)

We extend a fixed-point theorem of Reinermann [1] for the sum of two operators. Our results are then used to establish new existence results for differential equations in Banach spaces.

#### Continuation fixed point theorems for locally convex linear topological spaces

(Elsevier BV, 1996-08-01)

We present continuation results for operators between locally convex linear topological spaces. These results will then be applied to obtain existence principles for differential equations on semi-infinite intervals.

#### Global existence for nonlinear operator inclusions

(Elsevier BV, 1999-12-01)

#### 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)

#### Continuation methods for closed, weakly closed, dkt, and wdkt maps

(Elsevier BV, 1999-10-01)

#### Existence of solutions to singular integral equations

(Elsevier BV, 1999-05-01)