Published online by Cambridge University Press: 14 November 2011
Given a certain family ℱ of positive Borel measures and γ ∈ [0, 1), we define a general onesided maximal operator and we study weighted inequalities in Lp,q spaces for these operators. Our results contain, as particular cases, the characterisation of weighted Lorentz norm inequalities for some well-known one-sided maximal operators such as the one-sided Hardy–Littlewood maximal operator associated with a general measure , the one-sided fractional maximal operator and the maximal operator associated with the Cesèro-α averages.