Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: An extension of the Hirsch Index: Indexing scientific topics and
  compounds   An interesting twist of the Hirsch index is given, in terms of an index for
topics and compounds. By comparing both the hb index and m for a number of
compounds and topics, it can be used to differentiate between a new so-called
hot topic with older topics. This quick method is shown to help new comers to
identify how much interest and work has already been achieved in their chosen
area of research.

30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
18
The categories of this paper are: econ
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat