RT Journal Article T1 Multiplicity results for fourth order problems related to the theory of deformations beams A1 Cabada Fernández, Alberto A1 Jebari, Rochdi AB The main purpose of this paper is to establish the existence and multiplicity of positive solutions for a fourth-order boundary value problem with integral condition. By using a new technique of construct a positive cone, we apply the Krasnoselskii compression/expansion and Leggett-Williams fixed point theorems in cones to show our multiplicity results. Finally, a particular case is studied, and the existence of multiple solutions is proved for two different particular functions. PB American Institute of Mathematical Sciences SN 1531-3492 YR 2020 FD 2020-02 LK https://hdl.handle.net/10347/37751 UL https://hdl.handle.net/10347/37751 LA eng NO Alberto Cabada, Rochdi Jebari. Multiplicity results for fourth order problems related to the theory of deformations beams. Discrete and Continuous Dynamical Systems - B, 2020, 25(2): 489-505. doi: 10.3934/dcdsb.2019250 NO This article has been published in a revised form in DISCRETE AND CONTINUOUS DYNAMICAL SYSTEMS SERIES B. 10.3934/dcdsb.2019250. This version is free to download for private research and study only. Not for redistribution, re-sale or use in derivative works. DS Minerva RD 24 abr 2026