Locally compact homogeneous spaces with inner metric (1412.7893v1)

Abstract: The author reviews his results on locally compact homogeneous spaces with inner metric, in particular, homogeneous manifolds with inner metric. The latter are isometric to homogeneous (sub-)Finslerian manifolds; under some additional conditions they are isometric to homogeneous (sub)-Riemannian manifolds. The class $\Omega$ of all locally compact homogeneous spaces with inner metric is supplied with some metric $d_{BGH}$ such that 1) $(\Omega,d_{BGH})$ is a complete metric space; 2) a sequences in $(\Omega,d_{BGH})$ is converging if and only if it is converging in Gromov-Hausdorff sense; 3) the subclasses $\mathfrak{M}$ of homogeneous manifolds with inner metric and $\mathfrak{LG}$ of connected Lie groups with left-invariant Finslerian metric are everywhere dense in $(\Omega,d_{BGH}).$ It is given a metric characterization of Carnot groups with left-invariant sub-Finslerian metric. At the end are described homogeneous manifolds such that any invariant inner metric on any of them is Finslerian.