In this paper we investigate the L p boundedness of lacunary maximal function M H n l a c associated to spherical means A r f taken over Koranyi spheres on Heisenberg group. Closely following an approach used by M. Lacey in Euclidean case, obtain sparse bounds for these functions leading new unweighted and weighted estimates. The key ingredients proof are improving property operator continuity ...

Lacey, K. A., Hewison, A., and Parlin, J. M. (1973). Archives of Disease in Childhood, 48,508. Exercise as a screening test for growth hormone deficiency in children. The serum growth hormone response to exercise has been evaluated in 98 children with short stature. In 65 children growth hormone deficiency was excluded by a single postexercise level of more than 20 mIU/ml. The test is simple an...

MELISA OLAVE1, EDUARD SOLÀ2, AND L. LACEY KNOWLES3 1Centro Nacional Patagónico – Consejo Nacional de Investigaciones Científicas y Técnicas (CENPAT-CONICET), Puerto Madryn, Chubut U 9120 ACD, Argentina, 2Department de Genètica, Facultat de Biologia and Institut de Recerca de la Biodiversitat (IRBio), Universitat de Barcelona, Av. Diagonal, 643, 08028, Barcelona, Catalonia, Spain and 3Department...

Reports Renal Transport of p-Aminohippurate Labeled with Oxygen-18: J. V. Taggart ................................................... 401 Method of Preparing Radioactive Cations for Tracing Ground Water: W. J. Lacey and W. de Laguna ....... ............................ 402 Inhibition of Yeast Hexokinase by Fluoride Ion: N. C. Melchior and J. B. Melchior ...... ........................... 402 Au...

Salmonella spp is one of the most important causative agents of food borne diseases throughout the world (Lacey, 1993). The Salmonella is a Gram negative bacterium that is responsible for a variety of disease syndromes in humans and domesticated animals. There are more than 2200 serotypes of Salmonella and most of them are considered human pathogens (Pelzer, 1989). Salmonella is responsible for...

We establish several mixed Ap-A∞ bounds for CalderónZygmund operators that only involve one supremum. We address both cases when the A∞ part of the constant is measured using the exponential-logarithmic definition and using the Fujii-Wilson definition. In particular, we answer a question of the first author and provide an answer, up to a logarithmic factor, of a conjecture of Hytönen and Lacey....

We study the boundedness properties of truncation operators acting on bounded Hankel (or Toeplitz) infinite matrices. A relation with the Lacey-Thiele theorem on the bilinear Hilbert transform is established. We also study the behaviour of the truncation operators when restricted to Hankel matrices in the Schatten classes. 1. Statement of results In this note we will be dealing with infinite ma...