Weak-Type Boundedness of the Hardy–Littlewood Maximal Operator on Weighted Lorentz Spaces
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The main goal of this paper is to provide a characterization of the weak-type boundedness of the Hardy–Littlewood maximal operator, M, on weighted Lorentz spaces \(\Lambda ^p_u(w)\), whenever \(p>1\). This solves a problem left open in (Carro et al., Mem Am Math Soc. 2007). Moreover, with this result, we complete the program of unifying the study of the boundedness of M on weighted Lebesgue spaces and classical Lorentz spaces, which was initiated in the aforementioned monograph.
KeywordsWeighted Lorentz spaces Hardy–Littlewood maximal operator
Mathematics Subject Classification42B25 47A30
We would like to thank Prof. Javier Soria for the helpful discussions related with the subject of this paper, and also for his useful comments that let us improve the presentation of this paper. The first and second authors would also like to thank the University of Barcelona (UB) and the Institute of Mathematics of the University of Barcelona (IMUB) for providing us all the facilities and hosting us during the research stay that led to this collaboration. Finally, we would like to express our thanks to the Referees for their useful comments and suggestions. This work has been partially supported by Grants MTM2012-36378, MTM2013-40985-P, 2014SGR289, CONICET-PIP 2012-2014: 11220110101018, CONICET-PIP 2009-435, UBACyT 2002013010042BA, PICT 2014-1480 and UNLP 11X681.
- 5.Carro, M.J., Raposo, J.A., Soria, J.: Recent developments in the theory of Lorentz spaces and weighted inequalities. Mem. Am. Math. Soc. (2007). doi: 10.1090/memo/0877