Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A regular C^0 singularity is not necessarily weak   Examples of space-times are given which contain scalar curvature
singularities whereat the metric tensor is regular and continuous, but which
are gravitationally strong. Thus the argument that such singularities are
necessarily weak is incomplete; in particular the question of the gravitational
strength of the null Cauchy horizon singularity which occurs in gravitational
collapse remains open.

27
The categories of this paper are: comp-gas
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn