Twin solutions of boundary value problems for differential equations on measure chains

摘要

A new twin fixed point theorem is applied to obtain the existence of at least two positive solutions for the right focal boundary value problem on a measure chain T, yΔΔ(t)+f(y(σ(t)))=0,t∈[0,1]∩T,y(0)=yΔ(σ(1))=0.