Jin, B;
Li, B;
Zhou, Z;
(2019)
Subdiffusion with a time-dependent coefficient: Analysis and numerical solution.
Mathematics of Computation
, 88
pp. 2157-2186.
10.1090/mcom/3413.
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Abstract
In this work, a complete error analysis is presented for fully discrete solutions of the subdiffusion equation with a time-dependent diffusion coefficient, obtained by the Galerkin finite element method with conforming piecewise linear finite elements in space and backward Euler convolution quadrature in time. The regularity of the solutions of the subdiffusion model is proved for both nonsmooth initial data and incompatible source term. Optimal-order convergence of the numerical solutions is established using the proven solution regularity and a novel perturbation argument via freezing the diffusion coefficient at a fixed time. The analysis is supported by numerical experiments.
| Type: | Article |
|---|---|
| Title: | Subdiffusion with a time-dependent coefficient: Analysis and numerical solution |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1090/mcom/3413 |
| Publisher version: | https://doi.org/10.1090/mcom/3413 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Computer Science |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10063348 |
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