Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Chains of N=2, D=4 heterotic/type II duals   We report on a search for $N=2$ heterotic strings that are dual candidates of
type II compactifications on Calabi-Yau threefolds described as $K3$
fibrations. We find many new heterotic duals by using standard orbifold
techniques. The associated type II compactifications fall into chains in which
the proposed duals are heterotic compactifications related one another by a
sequential Higgs mechanism. This breaking in the heterotic side typically
involves the sequence $SU(4)\rightarrow SU(3)\rightarrow $ $SU(2)\rightarrow
0$, while in the type II side the weights of the complex hypersurfaces and the
structure of the $K3$ quotient singularities also follow specific patterns.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
16
The categories of this paper are: stat
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
3
The categories of this paper are: physics