Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hilbert transform along measurable vector fields constant on Lipschitz
  curves: $L^p$ boundedness   We prove the $L^p (p > 3/2)$ boundedness of the directional Hilbert transform
in the plane relative to measurable vector fields which are constant on
suitable Lipschitz curves.

18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
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The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
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The categories of this paper are: eess
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The categories of this paper are: hep-th
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an