Riesz means for the sublaplacian on the Heisenberg group
The uniform boundedness of the Riesz means for the sublaplacian on the Heisenberg groupHn is considered. It is proved thatSRα are uniformly bounded onLp(Hn) for 1≤p≤2 provided α>α(p)=(2n+1)[(1/p)−(1/2)].
Volume 130, 2020
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