The paper is devoted to the study of rational proper holomorphic maps from the unit ball B~n to the unit ball B~N. We classify these maps with both the geometri
Various forms of penalized estimators with good statistical and computational properties have been proposed for variable selection respecting the grouping struc
Arnold diffusion was conjectured by Arnol’d(1964) as a typical phenomena of topological instability in classical mechanics. In this paper, we give a panorama o