%0 Journal Article
%T About a virtual subset
%A Klaus Lange
%J Mathematics
%D 2009
%I arXiv
%X Two constructed prime number subsets (called prime brother & sisters and prime cousins) lead to a third one (called isolated primes) so that all three disjoint subsets together generate the prime number set. It should be suggested how the subset of isolated primes give a new approach to expand the set theory by using virtual subsets.
%U http://arxiv.org/abs/0904.4839v1