Triple Positive Solutions for Third-Order m-Point Boundary Value Problems on Time Scales

Abstract EN

We study the following third-order m-point boundary value problems on time scales (φ(uΔ∇))∇+a(t)f(u(t))=0, t∈[0,T]T, u(0)=∑i=1m−2biu(ξi), uΔ(T)=0, φ(uΔ∇(0))=∑i=1m−2ciφ(uΔ∇(ξi)), where φ:R→R is an increasing homeomorphism and homomorphism and φ(0)=0, 0<ξ1<⋯<ξm−2<ρ(T).

We obtain the existence of three positive solutions by using fixed-point theorem in cones.

The conclusions in this paper essentially extend and improve the known results.