Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Compact and weakly compact multipliers on Fourier algebras of
  ultraspherical hypergroups   A locally compact group $ G $ is discrete if and only if the Fourier algebra
$ A(G) $ has a non-zero (weakly) compact multiplier. We partially extend this
result to the setting of ultraspherical hypergroups. Let $H$ be an
ultraspherical hypergroup and let $A(H)$ denote the corresponding Fourier
algebra. We will give several characterizations of discreteness of $ H $ in the
terms of the algebraic properties of $A(H)$. We also study Arens regularity of
closed ideals of $ A(H)$.

15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
1
The categories of this paper are: cs
36
The categories of this paper are: cmp-lg
7
The categories of this paper are: hep-th
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The categories of this paper are: stat
11
The categories of this paper are: hep-lat
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: q-fin
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The categories of this paper are: solv-int