Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Going down from a 3-form in 16 dimensions   Group theory indicates the existence of a $SO(8) X SO(7) \subset SO(16)$
invariant self-duality equation for a 3-form in 16 dimensions. It is a signal
for interesting topological field theories, especially on 8-dimensional
manifolds with holonomy group smaller than or equal to Spin(7), with a gauge
symmetry that is SO(8) or SO(7). Dimensional reduction also provides new
supersymmetric theories in 4 and lower dimensions, as well as a model with
gravitational interactions in 8 dimensions, which relies on the octonionic
gravitational self-duality equation.

6
The categories of this paper are: astro-ph
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
26
The categories of this paper are: bayes-an
13
The categories of this paper are: quant-ph
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
19
The categories of this paper are: eess
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg