ABSTRACT
It is proved in [5] that if f is non-negative, then for any α ∈ (0, (n − 1)/2] ()‖rασ(f)‖∞≤C‖rα−1σ(f)‖1, https://s3-euw1-ap-pe-df-pch-content-public-p.s3.eu-west-1.amazonaws.com/9780367812027/499b2676-17a6-4805-9fd8-78c8baf0b813/content/eq602.tif"/>
