Alexander Domoshnitsky, Department of Mathematics and Computer Science, The Ariel University Center of Samaria, 44837 Ariel, Israel, e-mail: firstname.lastname@example.org; Robert Hakl, Institute of Mathematics, Academy of Sciences of the Czech Republic, Branch in Brno, Žižkova 22, 616 62 Brno, Czech Republic, e-mail: email@example.com; Bedřich Půža, Institute of Mathematics, Academy of Sciences of the Czech Republic, Branch in Brno, Žižkova 22, 616 62 Brno, Czech Republic, e-mail: firstname.lastname@example.org
Abstract: Consider the homogeneous equation
$$u'(t)=\ell(u)(t)\qquadfor a.e. t\in[a,b]$$
where $\ell C([a,b];\Bbb R)\to L([a,b];\Bbb R)$ is a linear bounded operator. The efficient conditions guaranteeing that the solution set to the equation considered is one-dimensional, generated by a positive monotone function, are established. The results obtained are applied to get new efficient conditions sufficient for the solvability of a class of boundary value problems for first order linear functional differential equations.
Keywords: functional differential equation, boundary value problem, differential inequality, solution set
Classification (MSC 2010): 34K06, 34K10
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