English

Induced Hausdorff metrics on quotient spaces

Differential Geometry 2017-03-28 v3 Metric Geometry

Abstract

Let GG be a group, (M,d)(M,d) be a metric space, XX be a compact subspace of MM and φ:G×MM\varphi:G\times M \rightarrow M be a left action by homeomorphisms of GG on MM. Denote gp=f(g,p)gp=f(g,p). The isotropy subgroup of GG with respect to XX is defined by HX={gG;gX=X}H_X=\{g\in G; gX=X\}. In this work we define the induced Hausdorff metric on G/HXG/H_X by dX(gHX,hHX)=dH(gX,hX)d_X(gH_X,hH_X)=d_H(gX,hX), where dHd_H is the Hausdorff distance on MM. Let d^X\hat d_X be the intrinsic metric induced by dXd_X. In this work we study the geometry of (G/HX,dX)(G/H_X,d_X) and (G/HX,d^X)(G/H_X,\hat d_X). In particular, we prove that if GG is a Lie group, MM is a differentiable manifold endowed with a metric dd which is locally Lipschitz equivalent to a Finsler metric, XX is a compact subset of MM and φ:G×MM\varphi:G \times M \rightarrow M is a smooth left action by isometries of GG on MM, then (G/HX,d^X)(G/H_X,\hat d_X) is C0C^0-Finsler.

Keywords

Cite

@article{arxiv.1604.07129,
  title  = {Induced Hausdorff metrics on quotient spaces},
  author = {Ryuichi Fukuoka and Djeison Benetti},
  journal= {arXiv preprint arXiv:1604.07129},
  year   = {2017}
}

Comments

42 pages