RT Journal Article T1 A constructive approach towards the method of solution-regions A1 Fernández Tojo, Fernando Adrián K1 System of First Order Differential Equations K1 Multiple Solutions K1 Fixed Point Index K1 General Boundary Conditions K1 Solution-Regions K1 Upper and Lower Solutions AB In this work we develop the theory of solution-regions with a constructive approach. We also extend the theory to the case of general linear conditions and provide various sets of sufficient hypotheses for existence and multiplicity results. PB Elsevier YR 2018 FD 2018 LK https://hdl.handle.net/10347/38457 UL https://hdl.handle.net/10347/38457 LA eng NO F. Adrián F. Tojo, A constructive approach towards the method of solution-regions, Journal of Mathematical Analysis and Applications, Volume 472, Issue 2, 2019, Pages 1803-1819 NO Ministerio de Economía y Competitividad de España NO Agencia Estatal de Investigación de España (MTM2016-75140-P) NO FEDER DS Minerva RD 30 abr 2026