Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Evolution of Binary Supermassive Black Holes via Chain Regularization   A chain regularization method is combined with special purpose computer
hardware to study the evolution of massive black hole binaries at the centers
of galaxies. Preliminary results with up to N=260,000 particles are presented.
The decay rate of the binary is shown to decrease with increasing N, as
expected on the basis of theoretical arguments. The eccentricity of the binary
remains small.

8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
0
The categories of this paper are: hep-ph
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
23
The categories of this paper are: solv-int