We study the existence of positive solutions of the two points boundary value problem μη(χ)+λf(υ(χ))=0, 0<χ<1, υ(0)=0=υ(1), where f satisfies f(0)<0, and sub-linear at ∞.
We study the existence of positive solutions of the two points boundary value problem μη(χ)+λf(υ(χ))=0, 0<χ<1, υ(0)=0=υ(1), where f satisfies f(0)<0, and sub-linear at ∞.