Cao Labora, DanielRodríguez López, Rosana2020-04-292020-04-292020Cao Labora, D.; Rodríguez-López, R. Constant Sign Solutions to Linear Fractional Integral Problems and Their Applications to the Monotone Method. Mathematics 2020, 8, 156.http://hdl.handle.net/10347/21884This manuscript provides some results concerning the sign of solutions for linear fractional integral equations with constant coefficients. This information is later used to prove the existence of solutions to some nonlinear problems, together with underestimates and overestimates. These results are obtained after applying suitable modifications in the classical process of monotone iterative techniques. Finally, we provide an example where we prove the existence of solutions, and we compute some estimates.eng© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)http://creativecommons.org/licenses/by/4.0/Fractional CalculusIntegral And Differential EquationsConstant Signjournal article10.3390/math80201562227-7390open access