Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the measure of KAM tori in two degrees of freedom   A conjecture of Arnold, Kozlov and Neishtadt on the exponentially small
measure of the non-torus set in analytic systems with two degrees of freedom is
discussed.

14
The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
10
The categories of this paper are: q-bio
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg