Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Torsion homology of arithmetic lattices and K2 of imaginary fields   We study upper bounds for the torsion in homology of nonuniform arithmetic
lattices. Together with recent results of Calegari-Venkatesh, this can be used
to obtain upper bounds on K2 of the ring of integers of totally imaginary
fields.

29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom