Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On inverse problems modeled by PDE's   We investigate the iterative methods proposed by Maz'ya and Kozlov (see [3],
[4]) for solving ill-posed reconstruction problems modeled by PDE's. We
consider linear time dependent problems of elliptic, hyperbolic and parabolic
types. Each iteration of the analyzed methods consists on the solution of a
well posed boundary (or initial) value problem. The iterations are described as
powers of affine operators, as in [4]. We give alternative convergence proofs
for the algorithms, using spectral theory and some functional analytical
results (see [5], [6]).

0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
9
The categories of this paper are: nlin
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
18
The categories of this paper are: econ
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph