Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On primes in arithmetic progression having a prescribed primitive root.
  II   Let a and f be coprime positive integers. Let g be an integer. Under the
Generalized Riemann Hypothesis (GRH) it follows by a result of H.W. Lenstra
that the set of primes p such that p=a(mod f) and g is a primitive root modulo
p has a natural density. In this note this density is explicitly evaluated with
an Euler product as result.

8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
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The categories of this paper are: comp-gas
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The categories of this paper are: quant-ph
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The categories of this paper are: hep-lat
18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
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The categories of this paper are: stat