Abstract
In this article, we consider a fractional diffusion equation of half order in time. We study inverse problems of determining the space-dependent factor in the source term from additional data at a fixed time and interior or boundary data over an appropriate time interval. We establish the global Lipschitz stability estimates in the inverse source problems. Our methods are based on Carleman estimates. Here we prove and use the Carleman estimates for a fractional diffusion equation of half order in time.
A Appendix
In this appendix, we state the Carleman estimate for second-order elliptic equations. We used this estimate in the proof of the Lipschitz stability estimate in inverse source problems.
We consider the following elliptic operator:
We assume that
Let
for
Lemma A.1 (Carleman estimate with weight φ ~ 0 , α ~ 0 for the elliptic equations).
There exists
for
all
Lemma A.2 (Carleman estimate with weight φ ~ 1 , α ~ 1 for the elliptic equations).
There exists
for
all
We may prove Lemmas A.1 and A.2 by a direct method similar to the proof of the Carleman estimates for the second-order parabolic equations (see [43] and the references therein).
Acknowledgements
The author would like to thank the anonymous referees and board members for their careful reading, invaluable comments and useful suggestions.
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© 2018 Walter de Gruyter GmbH, Berlin/Boston
Artikel in diesem Heft
- Frontmatter
- Identification of mathematical model of bacteria population under the antibiotic influence
- On the determination of differential pencils with nonlocal conditions
- An inverse problem in elastography involving Lamé systems
- Solution of the inverse seismic problem in a layered elastic medium by means of the τ-p Radon transform
- An adaptive multigrid conjugate gradient method for the inversion of a nonlinear convection-diffusion equation
- Ambarzumyan-type theorems on a time scale
- A converse result for Banach space convergence rates in Tikhonov-type convex regularization of ill-posed linear equations
- Lipschitz stability estimates in inverse source problems for a fractional diffusion equation of half order in time by Carleman estimates
- Inverse dynamic and spectral problems for the one-dimensional Dirac system on a finite tree
- Phaseless inverse problems with interference waves
- Quasi-solution of linear inverse problems in non-reflexive Banach spaces
Artikel in diesem Heft
- Frontmatter
- Identification of mathematical model of bacteria population under the antibiotic influence
- On the determination of differential pencils with nonlocal conditions
- An inverse problem in elastography involving Lamé systems
- Solution of the inverse seismic problem in a layered elastic medium by means of the τ-p Radon transform
- An adaptive multigrid conjugate gradient method for the inversion of a nonlinear convection-diffusion equation
- Ambarzumyan-type theorems on a time scale
- A converse result for Banach space convergence rates in Tikhonov-type convex regularization of ill-posed linear equations
- Lipschitz stability estimates in inverse source problems for a fractional diffusion equation of half order in time by Carleman estimates
- Inverse dynamic and spectral problems for the one-dimensional Dirac system on a finite tree
- Phaseless inverse problems with interference waves
- Quasi-solution of linear inverse problems in non-reflexive Banach spaces