Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Concentration properties of semi-vertex transitive graphs and random
  bi-coset graphs   It is well-known that concentrators are sparse graphs of high connectivity,
which play a key role in the construction of switching networks; and any
semi-vertex transitive graph is isomorphic to a bi-coset graph. In this paper,
we prove that random bi-coset graphs are almost always concentrators, and
construct some examples of semi-vertex transitive concentrators.

29
The categories of this paper are: funct-an
32
The categories of this paper are: atom-ph
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
10
The categories of this paper are: q-bio
16
The categories of this paper are: stat
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
20
The categories of this paper are: acc-phys
23
The categories of this paper are: solv-int