Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neumann conditions for the higher order $s$-fractional Laplacian
  $(-\Delta)^su$ with $s>1$   In this paper we study a variational Neumann problem for the higher order
$s$-fractional Laplacian, with $s>1$. In the process, we introduce some
non-local Neumann boundary conditions that appear in a natural way from a
Gauss-like integration formula.

18
The categories of this paper are: econ
1
The categories of this paper are: cs
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
12
The categories of this paper are: nucl-th
13
The categories of this paper are: quant-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
4
The categories of this paper are: cond-mat
21
The categories of this paper are: adap-org
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
5
The categories of this paper are: gr-qc