【摘要】 利用凸幂凝聚算子的不动点定理研究了Banach空间中一类非线性Volterra型积分方程u(t)=h(t)+∫0tg(t,s)f(s,u(s))dst∈J=[0,a]R(1)获得了解的存在性结果.定理1设f满足:(H1)对任给R>0,f在J×BR上一致连续,且存在连续函数a(s)≥0和常数b>0,使得‖f(s,u(s))‖≤a(s)‖u‖+b,u∈E,并且∫M0aa(s)ds<1,其中M=max{|g(t,s)|∶(t,s)∈D}.(H2)存在常数L>0,使得对C(J,E)中等度连续有界集B,有α(f(t,B(t))≤Lα(B(t)),t∈J.则方程(1)在C(J,E)中至少存在一个解.更多还原

【Abstract】 In this paper,the authors apply the new fixed point theroem of a kind of new operator,i.e.,convex-power condensing operator,to investigate a class of nonlinear Volterra integral equations in Banach spaces and obtain the existence of solutions for this integral equation.更多还原