Studies on the Product of Integro Quasi-Differential Equations and Their Solutions in Direct Sum Spaces

In this present chapter, we consider a product of quasi-differential expressions each of order n with complex coefficients and their formal adjoints on [0,b) respectively. We show in the direct sum spaces of functions defined on each of the separate intervals in the case of one singular end-points and under suitable conditions on the function F that all solutions of the product integro quasi-differential equations are bounded and bounded on [0,b).