Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cylindrically symmetric inhomogeneous dust collapse with a zero
  expansion component   We investigate a class of cylindrically symmetric inhomogeneous
$\Lambda$-dust spacetimes which have a regular axis and some zero expansion
component. For $\Lambda\ne 0$, we obtain new exact solutions to the Einstein
equations and show that they are unique, within that class. For $\Lambda=0$, we
recover the Senovilla-Vera metric and show that it can be locally matched to an
Einstein-Rosen type of exterior. Finally, we explore some consequences of the
matching, such as trapped surface formation and gravitational radiation in the
exterior.

37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
18
The categories of this paper are: econ
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
23
The categories of this paper are: solv-int
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th