文摘
We study solvability of boundary value problems for the so-called kinetic operator-differential equations of the form B(t)u t sub>?em class="a-plus-plus">L(t)u?=?f, where L(t) and B(t) are families of linear operators defined in a complex Hilbert space E. We do not assume that the operator B is invertible and that the spectrum of the pencil L ?em class="a-plus-plus">λ B is included into one of the half-planes Re λ a or Re λ >?a \({(a\in {\mathbb{R}})}\) . Under certain conditions on the above operators, we prove several existence and uniqueness theorems and study smoothness questions in weighted Sobolev spaces for solutions.