Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalized asymptotic structure of the ultrarelativistic Schwarzschild
  black hole   We discuss the asymptotic structure of the ultrarelativistic Schwarzschild
black hole. An explicit construction for a conformal boundary both at spatial
and null infinity is given together with the corresponding expressions for the
ADM and Bondi four-momenta.

17
The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
27
The categories of this paper are: comp-gas
19
The categories of this paper are: eess
11
The categories of this paper are: hep-lat
22
The categories of this paper are: chao-dyn
28
The categories of this paper are: alg-geom
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg