Twisted acceleration-enlarged Newton-Hooke space-times and breaking   classical symmetry phenomena
  We find the subgroup of classical acceleration-enlarged Newton-Hooke Hopf algebra which acts covariantly on the twisted acceleration-enlarged Newton-Hooke space-times. The case of classical acceleration-enlarged Galilei quantum group is considered as well. 
Marcin Daszkiewicz
math-ph gr-qc math.MP