Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new semidirect product for association schemes   We propose a new definition for the semidirect product of association
schemes, generalizing work of Bang, Hirasaka, and Song. We define an action of
one scheme on another, and show how one can use such an action to construct all
semidirect products satisfying a certain technical condition.

34
The categories of this paper are: chem-ph
24
The categories of this paper are: dg-ga
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
27
The categories of this paper are: comp-gas
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
9
The categories of this paper are: nlin
1
The categories of this paper are: cs
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
3
The categories of this paper are: physics
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th