Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The frozen phase of F-theory   We study the interpretation of O7+ planes in F-theory, mainly in the context
of the six-dimensional models. In particular, we study how to assign gauge
algebras and matter content to seven-branes and their intersections, and the
implication of anomaly cancellation in our construction, generalizing earlier
analyses without any O7+ planes. By including O7+ planes we can realize 6d
superconformal field theories hitherto unobtainable in F-theory, such as those
with hypermultiplets in the symmetric representation of su. We also examine a
couple of compact models. These reproduce some famous perturbative models, and
in some cases enhance their gauge symmetries non-perturbatively.

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The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
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The categories of this paper are: math
21
The categories of this paper are: adap-org
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The categories of this paper are: stat
20
The categories of this paper are: acc-phys
9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th