Partial data inverse problem with $L^{n/2}$ potentials
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- by Francis J. Chung and Leo Tzou HTML | PDF
- Trans. Amer. Math. Soc. Ser. B 7 (2020), 97-132
Abstract:
We construct an explicit Green’s function for the conjugated Laplacian $e^{-\omega \cdot x/h}\Delta e^{-\omega \cdot x/h}$, which lets us control our solutions on roughly half of the boundary. We apply the Green’s function to solve a partial data inverse problem for the Schrödinger equation with potential $q \in L^{n/2}$. Separately, we also use this Green’s function to derive $L^p$ Carleman estimates similar to the ones in Kenig-Ruiz-Sogge [Duke Math. J. 55 (1987), pp. 329–347], but for functions with support up to part of the boundary. Unlike many previous results, we did not obtain the partial data result from the boundary Carleman estimate—rather, both results stem from the same explicit construction of the Green’s function. This explicit Green’s function has potential future applications in obtaining direct numerical reconstruction algorithms for partial data Calderón problems which is presently only accessible with full data [Inverse Problems 27 (2011)].References
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Additional Information
- Francis J. Chung
- Affiliation: Department of Mathematics, University of Kentucky, Lexington, Kentucky
- MR Author ID: 1072547
- Email: fj.chung@uky.edu
- Leo Tzou
- Affiliation: School of Mathematics and Statistics, University of Sydney, Sydney, Australia
- MR Author ID: 746423
- Email: leo@maths.usyd.edu.au
- Received by editor(s): January 30, 2019
- Published electronically: September 10, 2020
- Additional Notes: The second author was supported by ARC DP190103302 and ARC DP190103451.
- © Copyright 2020 by the authors under Creative Commons Attribution-Noncommercial 3.0 License (CC BY NC 3.0)
- Journal: Trans. Amer. Math. Soc. Ser. B 7 (2020), 97-132
- MSC (2010): Primary 35R30
- DOI: https://doi.org/10.1090/btran/39
- MathSciNet review: 4147582