Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Commutator Estimates for the Dirichlet-to-Neumann Map in Lipschitz
  Domains   We establish two commutator estimates for the Dirichlet-to-Neumann map
associated with a second-order elliptic system in divergence form in Lipschitz
domains. Our approach is based on Dahlberg's bilinear estimates.

13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
7
The categories of this paper are: hep-th
36
The categories of this paper are: cmp-lg
11
The categories of this paper are: hep-lat
21
The categories of this paper are: adap-org
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat