Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Structure of D2-Branes in the Presence of an RR field   A Born--Infeld theory describing a $D2$--brane coupled to a 3--form RR
potential is reconsidered and a new type of static solution is obtained which
is even stable.

25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
8
The categories of this paper are: hep-ex
20
The categories of this paper are: acc-phys
34
The categories of this paper are: chem-ph
9
The categories of this paper are: nlin
5
The categories of this paper are: gr-qc
4
The categories of this paper are: cond-mat
22
The categories of this paper are: chao-dyn