Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Representations by octonary quadratic forms with coefficients $1$, $2$,
  $3$ or $6$   Using modular forms we determine formulas for the number of representations
of a positive integer by diagonal octonary quadratic forms with coefficients
$1$, $2$, $3$ or $6$.

34
The categories of this paper are: chem-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
36
The categories of this paper are: cmp-lg
15
The categories of this paper are: nucl-ex
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
7
The categories of this paper are: hep-th
31
The categories of this paper are: ao-sci
30
The categories of this paper are: q-alg
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
23
The categories of this paper are: solv-int