On Transitive Systems of Subspaces in a Hilbert Space
  Methods of *-representations in Hilbert space are applied to study of systems of $n$ subspaces in a linear space. It is proved that the problem of description of $n$-transitive subspaces in a finite-dimensional linear space is *-wild for $n \geq 5$. 
Yuliya P. Moskaleva and Yurii S. Samoilenko