... Positive Solutions to a Class of Singular Elastic Beam EquationsHuiqin LuSchool of Mathematical Sciences, Shandong Normal University , Jinan, 250014 Shandong, ChinaCorrespondence should be addressed ... Z. Bai, “The method of lower and upper solutions for a bending of an elastic beam equation,” Journal of Mathematical Analysis and Applications, vol. 248, no. 1, pp. 195–202, 2000.10 D. Franco, ... method of nonlinear cantilever beam equations,” Applied Mathemat-ics and Computation, vol. 205, no. 1, pp. 432–437, 2008.16 Q. Yao, “Solvability of singular cantilever beam equation,” Annals of...