Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Anisotropic Function Spaces and Elliptic Boundary Value Problems   In this paper, we study anisotropic Bessel potential and Besov spaces, where
the anisotropy measures the extra amount of regularity in certain directions.
Some basic properties of these spaces are established along with applications
to elliptic boundary value problems.

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The categories of this paper are: supr-con
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
21
The categories of this paper are: adap-org
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
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The categories of this paper are: q-fin
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ
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The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph