Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Global structure of Black Holes via dynamical system   We recast the system of Einstein field equations for Locally Rotationally
Symmetric spacetimes into an autonomous system of covariantly defined
geometrical variables. The analysis of this autonomous system gives all the
important global features of the maximal extension of these spacetimes. We
conclude that the dynamical system analysis can be a powerful mathematical tool
for qualitative understanding of the global structure of spacetimes
covariantly, without actually solving the field equations.

24
The categories of this paper are: dg-ga
2
The categories of this paper are: math
25
The categories of this paper are: patt-sol
21
The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
20
The categories of this paper are: acc-phys
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an