Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modern Techniques in Galaxy Kinematics: CDI and the Planetary Nebula
  Spectrograph   We report here the successful commissioning of the PN.Spectrograph, the first
special-purpose instrument for the measurement of galaxy kinematics through the
PN population

30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
14
The categories of this paper are: math-ph
0
The categories of this paper are: hep-ph
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an