on existence of solutions for some functional integral equations in banach algebra by fixed point theorem

In this research, we analyze the existence of solution for some nonlinear functional integral equations using the techniques of measures of noncompactness and the petryshyn’s fixed point theorem in banach space. the results obtained in this paper cover many existence results obtained by numerous authors under some weaker conditions. we also give an example satisfying the conditions of our main theorem but not satisfying the conditions described by other authors.