Kneser Type Theorem for Some Functional Integral Equation

摘要

In this paper we shall investigate the basic theory some functional integral equation which occur in the theory of populational problems. This type integral equation was first treated by Gurtin and MacCamy.Their model included the parameters which were death rate and birth rate depended on the total number of the population. Usual equations for mathematical population model can be solves along the characterlistic line. At last those equations will be some shape of integral equations. Also Gurtin and MacCamy made the integral equation which had the functional depended on the integration of the populational distribution.