Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Do Black Holes Form?   We argue that the collapse of a non-rotating object into a black hole has not
been proved to be dynamically stable. There are unstable modes and one should
explore whether they may be excited. This paper is withdrawn for revisions and
clarification

5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
21
The categories of this paper are: adap-org
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
16
The categories of this paper are: stat
33
The categories of this paper are: plasm-ph