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6 papers found.
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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.

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

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 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.

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.

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