Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Hyper-accreting black holes   Hyper-accretion disks are short-lived, powerful sources of neutrinos and
magnetized jets. Such disks are plausible sources of gamma-ray bursts. This
review describes the disk structure, the neutrino conversion to
electron-positron plasma around the disk, and the post-burst evolution.

30
The categories of this paper are: q-alg
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
31
The categories of this paper are: ao-sci
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
9
The categories of this paper are: nlin
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn