Abstract
This article studies the approximate controllability for a class of fractional control system with analytic semigroup governed by differential equations with Hilfer fractional derivatives of order \(\delta \in (0,1)\) and type \(\zeta \in [0,1]\) in a Banach space. The existence and uniqueness of the mild solution is established with the help of semigroup theory, fractional power of operators and a generalized contraction type fixed point theorem. Further, a set of sufficient conditions is formulated for the approximate controllability of the system under consideration. The result obtained holds irrespective of whether the generated semigroup is compact or non-compact.
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Acknowledgements
The second author expresses her gratitude to Indian Institute of Technology Guwahati, India for providing her senior research fellowship to carry out research towards Ph.D. The authors are grateful to the esteemed Reviewer for his/her insightful comments which have resulted in an improved version of the manuscript and to the Associate Editor Prof. Ioan Rasa for allowing a revision.
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The second author received senior research fellowship from Indian Institute of Technology Guwahati for the period 2018–2020.
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Conceptualization: BR, SNB; Methodology: BR; Formal analysis and investigation: BR; Writing - original draft preparation: BR, SNB; Writing - review and editing: BR, SNB.
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Bora, S.N., Roy, B. Approximate Controllability of a Class of Semilinear Hilfer Fractional Differential Equations. Results Math 76, 197 (2021). https://doi.org/10.1007/s00025-021-01507-1
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DOI: https://doi.org/10.1007/s00025-021-01507-1
Keywords
- Fractional differential equations
- Hilfer derivative
- analytic semigroup
- mild solutions
- fixed point theorem
- approximate controllability