Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Brane-Universe in Six Dimensions with Two Times   Brane-Universe model embedded in 6-dimensional space-time with the signature
(2+4) is considered. A matter is gravitationally trapped in three space
dimensions, but both time-like directions are open. Choosing of the dimension
and the signature of the model is initiated with the conformal symmetry for
massless particles and any point in our world can be (1+1) string-like object.

37
The categories of this paper are: supr-con
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
9
The categories of this paper are: nlin
20
The categories of this paper are: acc-phys
33
The categories of this paper are: plasm-ph
11
The categories of this paper are: hep-lat
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio