Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A problem with the escort distribution representation of nonextensive
  statistical mechanics   It is pointed out that the Tsallis entropy functional represented in terms of
the escort distribution is not concave of the entropic index $q$ is less than
unity. It is emphasized that the escort distribution is a secondary object
calculated from the basic original distribution.

6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
27
The categories of this paper are: comp-gas
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
34
The categories of this paper are: chem-ph
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga