Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Amenability of Hecke pairs and a question of Eymard   In this short paper we show that if $(G,H)$ is an amenable Hecke pair and
$\Gamma$ is a subgroup of $G$ containing $H$, then the Hecke pair $(\Gamma, H)$
is amenable too. This answers positively a question of Pierre Eymard, asked in
1972, when it is restricted to Hecke pairs

21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
24
The categories of this paper are: dg-ga
16
The categories of this paper are: stat
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
15
The categories of this paper are: nucl-ex
13
The categories of this paper are: quant-ph
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph