Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cylindrical versus Spherical Resonant Antennas for Gravitational Wave
  Detection   The principles and detection of gravitational waves by resonant antennas are
briefly discussed. But the main purpose of this short note is to compare the
two geometries of resonant antennas, the well-known cylindrical to the
spherical type. Some features of a two sphere observatory are also discussed.

9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
15
The categories of this paper are: nucl-ex
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
17
The categories of this paper are: q-fin
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
33
The categories of this paper are: plasm-ph
28
The categories of this paper are: alg-geom