A note on spectral theory of integral-functional Volterra operators

A concise overview of the spectral theory of integral-functional operators is provided. In the context of analysis, a technique is described for deriving solutions to equations involving operators in a closed form. A constructive theorem has been established, outlining a procedure for determining the eigenvalues and eigenfunctions of these operators. Based on this theory, an analytical approach for generating solutions to a Volterra-type integro-functional inhomogeneous equation is proposed. The example illustrates the proposed theory.