Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Three Lectures on the Riemann Zeta-Function   These expository lectures focus on the distribution of zeros of the Riemann
zeta function. The topics include the prime number theorem, the Riemann
hypothesis, mean value theorems, and random matrix models.

36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
29
The categories of this paper are: funct-an
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph