Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On coideal subalgebras of cocentral Kac algebras and a generalization of
  Wall's conjecture   It shown that any coideal subalgebra of a finite dimensional Hopf algebra is
a cyclic module over the dual Hopf algebra. Using this we describe all coideal
subalgebras of a cocentral abelian extension of Hopf algebras extending some
results from [4].

27
The categories of this paper are: comp-gas
30
The categories of this paper are: q-alg
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
16
The categories of this paper are: stat
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
33
The categories of this paper are: plasm-ph
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ