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9 papers found.
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Existence for a class of discrete hyperbolic problems

0 Rodica Luca: Department of Mathematics, Gheorghe Asachi Technical University of Ias i , Boulevard Carol I number 11, Ias i 700506, Romania E-mail address: We investigate the existence and

Existence and multiplicity of positive solutions for a system of fractional boundary value problems

We study the existence and multiplicity of positive solutions for a system of nonlinear Riemann-Liouville fractional differential equations, subject to integral boundary conditions. The nonsingular and singular cases for the nonlinearities are investigated.MSC: 34A08, 45G15.

Positive solutions to a system of semipositone fractional boundary value problems

Rodica Luca 0 Alexandru Tudorache 1 0 Department of Mathematics, Gh. Asachi Technical University , Iasi, 700506 , Romania 1 Faculty of Computer Engineering and Automatic Control, Gh. Asachi

Nonexistence of positive solutions for a system of coupled fractional boundary value problems

We investigate the nonexistence of positive solutions for a system of nonlinear Riemann-Liouville fractional differential equations with coupled integral boundary conditions. MSC: 34A08, 45G15.

Positive Solutions for Systems of Second-Order Difference Equations

Mathematics, Gheorghe Asachi Technical University, 700506 Iasi, Romania Received 17 March 2015; Accepted 30 August 2015 Academic Editor: Miguel Ángel López Copyright © 2015 Johnny Henderson and Rodica Luca

Positive solutions for a system of semipositone coupled fractional boundary value problems

We study the existence of positive solutions for a system of nonlinear Riemann-Liouville fractional differential equations with sign-changing nonlinearities, subject to coupled integral boundary conditions. MSC: 34A08, 45G15.

Existence and Nonexistence of Positive Solutions for Coupled Riemann-Liouville Fractional Boundary Value Problems

interests regarding the publication of this paper and regarding the funding that they have received. Acknowledgments The work of Rodica Luca and Alexandru Tudorache was supported by the CNCS Grant PN-II-ID

Existence and Nonexistence of Positive Solutions for Coupled Riemann-Liouville Fractional Boundary Value Problems

of this paper and regarding the funding that they have received. Acknowledgments The work of Rodica Luca and Alexandru Tudorache was supported by the CNCS Grant PN-II-ID-PCE-2011-3-0557, Romania

Positive solutions for a system of second-order discrete boundary value problems

We study the existence and multiplicity of positive solutions for a system of nonlinear second-order difference equations subject to multi-point boundary conditions, under some assumptions on the nonlinearities of the system which contains concave functions. In the proofs of our main results we use some theorems from the fixed point index theory.