... Journal of Inequalities and Applications see, e.g., 18 and for fractional maximal functions and Riesz potentials by Muckenhoupt and Wheeden 19 Two-weight criteria for the Hardy-Littlewood maximal ... 34, page that the measure of noncompactness of T is greater than or equal to limn → ∞ en T In the sequel, we assume that X is a Banach space which is a certain subset of all Haarmeasurable functions ... some classical operators,” Acta Mathematica Sinica, vol 22, no 6, pp 1847–1862, 2006 D E Edmunds and A Meskhi, “On a measure of non-compactness for maximal operators,” Mathematische Nachrichten,...