The existence of positive solutions for a nonlinear four-point singular boundary value problem with a pp-Laplacian operator

In this paper, we study the existence of positive solutions for the nonlinear four-point singular boundary value problem with a pp-Laplacian operator. By using the fixed-point index theory, the existence of a positive solution and many positive solutions for a nonlinear four-point singular boundary value problem with a pp-Laplacian operator are obtained.