Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A classification of long-range interactions between two stacks of $p$ \&
  $p'$-branes   We generalize the computations of the long-range interactions between two
parallel stacks of branes in \cite{Wu and Wang, Prof. Lu's lecture notes} to
various cases when two stacks of branes are not placed parallel to each other.
We classify the nature of interaction (repulsive or attractive) for each
special case and this classification can be used to justify the nature of
long-range interaction between two complicated brane systems such as brane
bound states. We will provide explicit examples in this paper to demonstrate
this.

4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
36
The categories of this paper are: cmp-lg
12
The categories of this paper are: nucl-th
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
30
The categories of this paper are: q-alg