Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Maximally supersymmetric solutions of ten- and eleven-dimensional
  supergravities   We classify (up to local isometry) the maximally supersymmetric solutions of
the eleven- and ten-dimensional supergravity theories. We find that the AdS
solutions, the Hpp-waves and the flat space solutions exhaust them.

14
The categories of this paper are: math-ph
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
35
The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
32
The categories of this paper are: atom-ph
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
28
The categories of this paper are: alg-geom