Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The fractional Hartree equation without the Ambrosetti-Rabinowitz
  condition   We consider a class of pseudo-relativistic Hartree equations in presence of
general nonlinearities not satisfying the Ambrosetti-Rabinowitz condition.
Using variational methods based on critical point theory, we show the existence
of two non trivial signed solutions, one positive and one negative.

34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
21
The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
10
The categories of this paper are: q-bio
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The categories of this paper are: ao-sci
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-fin
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th