Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the Heterotic/F-Theory Duality in Eight Dimensions   We review quantitative tests on the duality between the heterotic string on
T^2 and F-theory on K3. On the heterotic side, certain threshold corrections to
the effective action can be exactly computed at one-loop order, and the issue
is to reproduce these from geometric quantities pertaining to the K3 surface.
In doing so we learn about certain non-perturbative interactions of 7-branes.

12
The categories of this paper are: nucl-th
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The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
18
The categories of this paper are: econ
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
27
The categories of this paper are: comp-gas
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys