Mr. Agrawal et Ub. Tewari, ON EXISTENCE OF FINITE UNIVERSAL KOROVKIN-SETS IN THE CENTER OF GROUP-ALGEBRAS, Monatshefte fuer Mathematik, 123(1), 1997, pp. 1-20
In this paper, we characterize compact groups G as well as connected c
entral topological groups G for which the centre Z(L(1)(G)) admits a f
inite universal Korovkin set. Also we prove that if G is a non-connect
ed central topological group which has a compact open normal subgroup
K such that G = KZ, then Z(L(1)(G)) admits a finite universal Korovkin
set if (G) over cap is a finite-dimensional separable metric space or
equivalently G is separable metrizable and G/K has finite torsion-fre
e rank.