Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The canonical superenergy tensors and stability of the solutions to the
  Einstein equations   Here we present a new method to study stability of the solutions to the
Einstein equations. This method uses the canonical superenergy tensors which
have been introduced in past in our papers.

14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
17
The categories of this paper are: q-fin
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an