Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cartan Prolongation of a Family of Curves Acquiring a Node   Using the monster/Semple tower construction, we study the structure of the
Cartan prolongation of the family $x_1x_2 = t$ of plane curves with nodal
central member.

23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
17
The categories of this paper are: q-fin
7
The categories of this paper are: hep-th
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
4
The categories of this paper are: cond-mat