Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multibump nodal solutions for an indefinite superlinear elliptic problem   We define some Nehari-type constraints using an orthogonal decomposition of
the Sobolev space $H^1_0$ and prove the existence of multibump nodal solutions
for an indefinite superlinear elliptic problem.

11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
9
The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
15
The categories of this paper are: nucl-ex
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
21
The categories of this paper are: adap-org