M MARKOVIC, P MELENTIJEVIC - arXiv preprint arXiv …, 2019 - researchgate.net
We consider two-sided estimates of (| P+f| s+| P− f| s) 1 s Lp (T) in terms of Lebesgue p-norm
of the function f∈ Lp (T). For some values of parameters 0< s<∞ and p, our inequalities are …