Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Metrics on End-Periodic Manifolds as Models for Dark Matter   In this paper we will detail an approach to generate metrics and matter
models on end-periodic manifolds, which are used extensively in the study of
the exotic smooth structures of $\mathbb{R}^4$. We will present three distinct
examples, discuss their associated matter models by solving the Einstein
equations, and determine their physical viability by examining the energy
conditions. We will also compare one of the models directly with existing
models of matter distributions in extragalactic systems, to highlight the
viability of utilizing exotic smooth structures to understand the existence and
distribution of dark matter.

9
The categories of this paper are: nlin
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
30
The categories of this paper are: q-alg