Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Bounds for singular fractional integrals and related Fourier integral
  operators   We prove sharp L^p-L^q endpoint bounds for singular fractional integral
operators and related Fourier integral operators, under the nonvanishing
rotational curvature assumption.

19
The categories of this paper are: eess
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom