Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Hecke-type double-sums and general string functions for the affine
  Lie algebra $A_{1}^{(1)}$   We demonstrate how formulas that express Hecke-type double-sums in terms of
theta functions and Appell--Lerch functions -- the building blocks of
Ramanujan's mock theta functions -- can be used to give general string function
formulas for the affine Lie algebra $A_{1}^{(1)}$ for levels $N=1,2,3,4$.

6
The categories of this paper are: astro-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
35
The categories of this paper are: mtrl-th
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-th
8
The categories of this paper are: hep-ex
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The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph
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The categories of this paper are: q-bio