Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Lichnerowicz-type result on a seven-dimensional quaternionic contact
  manifold   In this paper we establish an analogue of the classical Lichnerowicz' theorem
giving a sharp lower bound of the first non-zero eigenvalue of the
sub-Laplacian on a compact seven-dimensional quaternionic contact manifold,
assuming a lower bound of the qc-Ricci tensor, torsion tensor and its
distinguished covariant derivatives.

1
The categories of this paper are: cs
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
37
The categories of this paper are: supr-con
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
34
The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex
27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
22
The categories of this paper are: chao-dyn
17
The categories of this paper are: q-fin
16
The categories of this paper are: stat
3
The categories of this paper are: physics
11
The categories of this paper are: hep-lat