... Boundary Value Problems The class of problems 1.1 appears in many nonlinear phenomena, for instance, in the theory of quasiregular and quasiconformal mappings 1–3 , in the generalized reaction-diffusion ... no 2, pp 498–505, 1996 13 A V Lair and A W Shaker, “Classical and weak solutions of a singular semilinear elliptic problem, ” Journal of Mathematical Analysis and Applications, vol 211, no 2, pp ... Boundary Value Problems 16 C A Santos, “On ground state solutions for singular and semi-linear problems including super-linear terms at in nity,” Nonlinear Analysis: Theory, Methods & Applications...