RT Journal Article T1 Nonlinear perturbed integral equations related to nonlocal boundary value problems A1 Cabada Fernández, Alberto A1 Infante, Gennaro A1 Fernández Tojo, Fernando Adrián K1 Perturbed integral equation K1 Nonlocal differential equation K1 Nonlinear boundary condition K1 Nontrivial solution K1 Fixed point index K1 Cone AB By topological arguments, we prove new results on the existence, non-existence, localization and multiplicity of nontrivial solutions of a class of perturbed nonlinear integral equations. These type of integral equations arise, for example, when dealing with boundary value problems where nonlocal terms occur in the differential equation and/or in the boundary conditions. Some examples are given to illustrate the theoretical results. PB Department of Mathematics Babeş-Bolyai University Cluj-Napoca SN 1583-5022 YR 2018 FD 2018-02-01 LK https://hdl.handle.net/10347/44941 UL https://hdl.handle.net/10347/44941 LA eng NO Alberto Cabada, Gennaro Infante and F. Adrián F. Tojo, Nonlinear perturbed integral equations related to nonlocal boundary value problems. Fixed Point Theory, Volume 19, No. 1, 2018, 65-92, February 1st, 2018 NO A. Cabada and F. A. F. Tojo were partially supported by Ministerio de Educacion y Ciencia, Spain, and FEDER, Project MTM2013-43014-P. F. A. F. Tojo was partially supported by Xunta de Galicia (Spain), project EM2014/032; FPU scholarship, Ministerio de Educacion, Cultura y Deporte, Spain and a Fundaci on Barrie Scholarship. G. Infante was partially supported by G.N.A.M.P.A. - INdAM (Italy). DS Minerva RD 24 abr 2026