On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value Problems

This article deals with a class of nonlinear fractional differential equations, with initial conditions, involving the Riemann–Liouville fractional derivative of order <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics>&...

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Main Authors: Luís P. Castro, Anabela S. Silva
Format: Article
Language:English
Published: MDPI AG 2023-01-01
Series:Mathematics
Subjects:
Online Access:https://www.mdpi.com/2227-7390/11/2/297
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author Luís P. Castro
Anabela S. Silva
author_facet Luís P. Castro
Anabela S. Silva
author_sort Luís P. Castro
collection DOAJ
description This article deals with a class of nonlinear fractional differential equations, with initial conditions, involving the Riemann–Liouville fractional derivative of order <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>α</mi><mo>∈</mo><mo>(</mo><mn>1</mn><mo>,</mo><mn>2</mn><mo>)</mo></mrow></semantics></math></inline-formula>. The main objectives are to obtain conditions for the existence and uniqueness of solutions (within appropriate spaces), and to analyze the stabilities of Ulam–Hyers and Ulam–Hyers–Rassias types. In fact, different conditions for the existence and uniqueness of solutions are obtained based on the analysis of an associated class of fractional integral equations and distinct fixed-point arguments. Additionally, using a Bielecki-type metric and some additional contractive arguments, conditions are also obtained to guarantee Ulam–Hyers and Ulam–Hyers–Rassias stabilities for the problems under analysis. Examples are also included to illustrate the theory.
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spelling doaj.art-0a7bb22b09da4d56b782e886d38dcea82023-11-30T23:20:14ZengMDPI AGMathematics2227-73902023-01-0111229710.3390/math11020297On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value ProblemsLuís P. Castro0Anabela S. Silva1CIDMA—Center for Research and Development in Mathematics and Applications, University of Aveiro, 3810-193 Aveiro, PortugalCIDMA—Center for Research and Development in Mathematics and Applications, University of Aveiro, 3810-193 Aveiro, PortugalThis article deals with a class of nonlinear fractional differential equations, with initial conditions, involving the Riemann–Liouville fractional derivative of order <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mi>α</mi><mo>∈</mo><mo>(</mo><mn>1</mn><mo>,</mo><mn>2</mn><mo>)</mo></mrow></semantics></math></inline-formula>. The main objectives are to obtain conditions for the existence and uniqueness of solutions (within appropriate spaces), and to analyze the stabilities of Ulam–Hyers and Ulam–Hyers–Rassias types. In fact, different conditions for the existence and uniqueness of solutions are obtained based on the analysis of an associated class of fractional integral equations and distinct fixed-point arguments. Additionally, using a Bielecki-type metric and some additional contractive arguments, conditions are also obtained to guarantee Ulam–Hyers and Ulam–Hyers–Rassias stabilities for the problems under analysis. Examples are also included to illustrate the theory.https://www.mdpi.com/2227-7390/11/2/297fractional differential equationsRiemann–Liouville derivativefixed point theoryUlam–Hyers stabilityUlam–Hyers–Rassias stability
spellingShingle Luís P. Castro
Anabela S. Silva
On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value Problems
Mathematics
fractional differential equations
Riemann–Liouville derivative
fixed point theory
Ulam–Hyers stability
Ulam–Hyers–Rassias stability
title On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value Problems
title_full On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value Problems
title_fullStr On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value Problems
title_full_unstemmed On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value Problems
title_short On the Existence and Stability of Solutions for a Class of Fractional Riemann–Liouville Initial Value Problems
title_sort on the existence and stability of solutions for a class of fractional riemann liouville initial value problems
topic fractional differential equations
Riemann–Liouville derivative
fixed point theory
Ulam–Hyers stability
Ulam–Hyers–Rassias stability
url https://www.mdpi.com/2227-7390/11/2/297
work_keys_str_mv AT luispcastro ontheexistenceandstabilityofsolutionsforaclassoffractionalriemannliouvilleinitialvalueproblems
AT anabelassilva ontheexistenceandstabilityofsolutionsforaclassoffractionalriemannliouvilleinitialvalueproblems