Multiple Positive Fixed Points for the Sum Operator of [[alpha]] Concave Operator and [[beta]] Convex Operator and Their Applications
[[alpha]]凹算子与[[beta]]凸算子之和的多重不动点及其应用

In this paper, we consider the existence of multiple positive fixed points for some nonlinear operators, in particular, the sum of alpha]] concove operators and beta]] convex operators. Then we apply the result to the singular superlinear second order boundary value problems.