Abstract and Applied Analysis
Volume 2004 (2004), Issue 1, Pages 45-67
doi:10.1155/S1085337504309061

On a boundary value problem for scalar linear functional differential equations

R. Hakl1 , A. Lomtatidze2 and I.P. Stavroulakis3

1Mathematical Institute, Czech Academy of Sciences, Brno 616 62, Czech Republic
 2Department of Mathematical Analysis, Faculty of Science, Masaryk University, Brno 66295, Czech Republic
 3Department of Mathematics, University of Ioannina, Ioannina 451 10, Greece

Abstract

Theorems on the Fredholm alternative and well-posedness of the linear boundary value problem u′(t)=ℓ(u)(t)+q(t), h(u)=c, where ℓ:C([a,b];ℝ)→L([a,b];ℝ) and h:C([a,b];ℝ)→ℝ are linear bounded operators, q∈L([a,b];ℝ), and c∈ℝ, are established even in the case when ℓ is not a strongly bounded operator. The question on the dimension of the solution space of the homogeneous equation u′(t)=ℓ(u)(t) is discussed as well.