Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reducing heterotic M-theory to five dimensional supergravity on a
  manifold with boundary   This paper constructs the reduction of heterotic $M$-theory in eleven
dimensions to a supergravity model on a manifold with boundary in five
dimensions using a Calabi-Yau three-fold. New results are presented for the
boundary terms in the action and for the boundary conditions on the bulk
fields. Some general features of dualisation on a manifold with boundary are
used to explain the origin of some topological terms in the action. The effect
of gaugino condensation on the fermion boundary conditions leads to a `twist'
in the chirality of the gravitino which can provide an uplifting mechanism in
the vacuum energy to cancel the cosmological constant after moduli
stabilisation.

30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
12
The categories of this paper are: nucl-th
6
The categories of this paper are: astro-ph
28
The categories of this paper are: alg-geom
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
14
The categories of this paper are: math-ph