... 2275–2283 J Y Wang and J Jiang, The existence of positive solutions to a singular nonlinear boundary value problem, J Math Anal Appl 176 (1993), no 2, 322–329 Ruyun Ma: Department of Mathematics, Northwest ... Normal University, Lanzhou 730070, China E-mail address: mary@maths.uq.edu.au Yulian An: Physical Software & Engineering, Lanzhou Jiaotong University, Lanzhou 730070, Gansu, China E-mail address: ... solutions for a nonlinear differential equation with nonlinear boundary conditions, Ann Polon Math 69 (1998), no 2, 155–165 L Erbe and M Tang, Structure of positive radial solutions of semilinear elliptic...