摘要
I. INTRODUCTION Let E be a Banach space, and P be a cone in E, P_R={x∈P|‖x‖<R}, P_R={x∈P|‖x‖=R}, u∈P\{θ}, P(u)= {x∈P|αx≥u, for some positive number α}. After Krasnosel’skii et al. studied the compression of the cone theorem, their result consists of the following.
