Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Circular arcs are the only analytic Jordan curves with an exterior power
  point   In 1946, J. Rosenbaum proposed a family of problems asking how many power
points are needed to ensure that the boundary $c$ of a given convex body is a
disk. In this paper, we use Riordan matrices to show that, if this curve $c$ is
analytic, then one single exterior power point is sufficient.

7
The categories of this paper are: hep-th
0
The categories of this paper are: hep-ph
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ