Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Sign Problem is the Solution   The unquenched spectral density of the Dirac operator at $\mu\neq0$ is
complex and has oscillations with a period inversely proportional to the volume
and an amplitude that grows exponentially with the volume. Here we show how the
oscillations lead to the discontinuity of the chiral condensate.

27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
19
The categories of this paper are: eess