Systems of sets with multiplicative asymptotic density
Pavel Jahoda, Monika Pěluchová · Mathematica Slovaca · 2008
Abstract The authors define a notion of system of sets with multiplicative asymptotic density in this paper. A criterion and one necessary condition for a given system {A i}i=1∞ to be a system with multiplicative asymptotic density is given. Properties of certain special types of systems of sets with multiplicative asymptotic density are treated.