RT Journal Article T1 Existence, non-existence and multiplicity results for a third order eigenvalue three-point boundary value problem A1 Cabada Fernández, Alberto A1 López Somoza, Lucía A1 Minhós, Feliz K1 Nonlinear boundary value problems K1 Parameter dependence K1 Multipoint boundary value problems K1 Green functions K1 Degree theory K1 Fixed points in cones AB This paper provides sufficient conditions to guarantee the existence, non-existence and multiplicity of solutions for a third order eigenvalue fully differential equation, coupled with three point boundary value conditions. Although the change of sign, some bounds for the second derivative of the Green's function are obtained, which allow to define a different kind of cone that, as far as we know, has not been previously used in the literature. The main arguments are based on the fixed point index theory for bounded and unbounded sets. Some examples are presented in order to show that the different existence theorems proved are not comparable PB The International Scientific Research Publications (ISRP) SN 2008-1898 YR 2017 FD 2017-10-28 LK http://hdl.handle.net/10347/16785 UL http://hdl.handle.net/10347/16785 LA eng NO A. Cabada, Lucía L.-Somoza, F. Minhós, Existence, non-existence and multiplicity results for a third order eigenvalue three-point boundary value problem, Journal of Nonlinear Science and Applications, 10 (2017), 5445–5463 DS Minerva RD 29 abr 2026