Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Sharp Hardy-Littlewood-Sobolev Inequalities on Octonionic Heisenberg
  Group   This paper is a second one following our work [CLZ13] in series, considering
sharp Hardy- Littlewood-Sobolev inequalities on groups of Heisenberg type. The
first important breakthrough was made by Frank and Lieb in [FL12]. In this
paper, analogous results are obtained for octonionic Heisenberg group.

8
The categories of this paper are: hep-ex
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys
17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
18
The categories of this paper are: econ
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
14
The categories of this paper are: math-ph
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics