Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Integral geometry and unique continuation principles   This is the introductory part of my PhD thesis on inverse problems arising in
medical and seismic imaging. The topics include X-ray tomography of scalar and
vector fields with partial data, higher order fractional Calder\'on problems,
travel time tomography on Riemannian and Finsler manifolds, and unique
continuation of fractional Laplacians. The thesis additionally includes these
articles: arXiv:1909.05585, arXiv:2001.06210, arXiv:2006.05790,
arXiv:2008.10227, arXiv:2009.01043, arXiv:2010.11484, arXiv:2103.14385.

20
The categories of this paper are: acc-phys
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
19
The categories of this paper are: eess
17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con