Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Homoclinic orbits for a class of nonperiodic Hamiltonian systems with
  some twisted conditions   In this paper, by the Masolv index theory, we will study the existence and
multiplicity of homoclinic orbits for a class of asymptotically linear
nonperiodic Hamiltonian systems with some twisted conditions on the Hamiltonian
functions

16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
4
The categories of this paper are: cond-mat
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
11
The categories of this paper are: hep-lat
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th