title: how to simplify combinatioral map using CGAL
body: <p>I want to simplify or edge collapse a mesh read from .off file as a combinatorial map using CGAL </p>
  
  <p>After searching all I found is Surface_mesh_simplification , 
  but I want simplification as a combinatorial map not as a polyhedral surface</p>
  
  <p>I appreciate any help or useful links .</p>