Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Amenability of Hopf C^*-algebras   Three natural definitions for amenability of general Hopf C^*-algebras (all
of them being generalizations of the case of locally compact groups) were given
and the relations between them were studied. Moreover, amenability in the
situation of duality of Hopf C^*-algebras was also studied.

15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
1
The categories of this paper are: cs
37
The categories of this paper are: supr-con
25
The categories of this paper are: patt-sol
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph