Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Boosting Taub-NUT to a BPS NUT-wave   The boosted Taub-NUT metric with zero ADM mass is shown to possess a dual
momentum in the direction of the boost giving credit to the existence of
another 4-vector K_\mu in linearized gravity associated to the NUT charge and
dual to the usual P_\mu. Taking the infinite boost limit we obtain a shock
pp-wave with NUT charge. We show that the latter is the gravitational dual of
the infinitely boosted Schwarzschild metric, also known as the Aichelburg-Sexl
pp-wave. We review the fact that this new shock pp-wave is also an half-BPS
solution of N=1 supergravity. It has a BPS bound equal to K_t=|K_z|.

16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
37
The categories of this paper are: supr-con
22
The categories of this paper are: chao-dyn
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org