%0 Journal Article
%T Deformed Galilei symmetry
%A P. Kosi¨½ski
%A P. Ma£żlanka
%J Mathematics
%D 1998
%I arXiv
%R 10.1142/S0217732399002200
%X A particular deformation of central extended Galilei group is considered. It is shown that the deformation influences the rules of constructing the composed systems while one particle states remain basically unaffected. In particular the mass appeared to be non additive.
%U http://arxiv.org/abs/math/9811142v1