Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Natural connections with torsion expressed by the metric tensors on
  almost contact manifolds with B-metric   On a main class of the almost contact manifolds with B-metric, it is
described the family of the linear connections preserving the manifold's
structures by 4 parameters. In this family there are determined the
canonical-type connection and the connection with zero parameters.

33
The categories of this paper are: plasm-ph
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
4
The categories of this paper are: cond-mat
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat
23
The categories of this paper are: solv-int
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
35
The categories of this paper are: mtrl-th
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
22
The categories of this paper are: chao-dyn