Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Curvature properties on some classes of almost contact manifolds with
  B-metric   Almost contact manifolds with B-metric are considered. Of special interest
are the so-called vertical classes of the almost contact B-metric manifolds.
Curvature properties of these manifolds are studied. An example of
5-dimensional manifolds is constructed and characterized.

30
The categories of this paper are: q-alg
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
29
The categories of this paper are: funct-an
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
17
The categories of this paper are: q-fin
13
The categories of this paper are: quant-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
5
The categories of this paper are: gr-qc