Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On some AC^{\perp} manifolds   We give a description of Gray AC^{\perp} manifolds $(M,g)$ whose Ricci tensor
has two eigenvalues of multiplicity 1 and dim M-1.

17
The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
13
The categories of this paper are: quant-ph
33
The categories of this paper are: plasm-ph
36
The categories of this paper are: cmp-lg
6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
9
The categories of this paper are: nlin
11
The categories of this paper are: hep-lat