Abstract
We consider the evolution equation whose right-hand side is the sum of a linear unbounded operator generating a compact strongly continuous semigroup and a continuous operator acting in function spaces. We prove the existence of a solution that stays within a given closed convex set and moreover, satisfies a functional boundary condition, particular cases of which are the Cauchy initial condition, periodicity condition, mixed condition including continuous transformations of spatial variables, etc. The main result is illustrated by using an example of the boundary-value problem for a partial operator-differential equation.
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Translated fromMatematicheskie Zametki, Vol. 65, No. 1, pp. 48–60, January, 1999.
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Goncharov, V.V., Timoshin, S.A. A class of evolution equations: Existence of solutions with functional boundary conditions. Math Notes 65, 41–50 (1999). https://doi.org/10.1007/BF02675008
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DOI: https://doi.org/10.1007/BF02675008