Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Matters of Gravity, a newsletter for the gravity community   Table of contents:
  -Editorial and Correspondents
  Gravity news:
  -LISA Recommended to ESA as Possible New Cornerstone Mission, Peter Bender.
  -LIGO Project News, Stan Whitcomb.
  Research briefs:
  -Some Recent Work in General Relativistic Astrophysics, John Friedman.
  -Pair Creation of Black Holes, Gary Horowitz.
  -Conformal Field Equations and Global Properties of Spacetimes, Bernd Schmidt
  Conference reports:
  -Aspen Workshop on Numerical Investigations of Singularities in GR, Susan
Scott
  -Second Annual Penn State Conference: Quantum Geometry, Abhay Ashtekar
  -First Samos Meeting, Spiros Cotsakis and Dieter Brill
  -Aspen Conference on Gravitational Waves and Their Detection, Syd Meshkov

23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
2
The categories of this paper are: math
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an