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Somayeh Nemati

Somayeh Nemati

Academic rank: Associate Professor
ORCID:
Education: PhD.
ScopusId:
Faculty: Faculty of Mathematical Sciences
Address:
Phone: 01135302419

Research

Title
An efficient numerical scheme for solving a general class of fractional differential equations via fractional-order hybrid Jacobi functions
Type
JournalPaper
Keywords
Fractional differential equations, Fractional-order hybrid functions, Bagley–Torvik equation, Error bound
Year
2024
Journal Communications in Nonlinear Science and Numerical Simulation
DOI
Researchers Zeinab Barary Darzinaghib ، Allah Bakhsh Yazdani Cherati ، Somayeh Nemati

Abstract

We introduce a numerical algorithm based on the hybrid of block-pulse functions and fractional-order Jacobi polynomials in order to solve fractional differential equations. The fractional derivative is described in the Caputo sense. The Riemann–Liouville fractional integral operator for these basis functions is constructed. This result together with the shifted Gauss–Chebyshev collocation points are utilized to reduce the original problem to a system of nonlinear algebraic equations. By means of solving the given system, the numerical solution of the main problem is derived. Then, the method is applied for solving the Bagley–Torvik initial and boundary value problems. After that, an error estimation is presented for the expansion of a given function based on the fractional-order basis functions. Finally, for demonstrating the precision and good performance of the new method, several numerical examples are considered and the results are compared with the exact or approximate solutions obtained by other existing techniques.