NAME

       geo_domain - a named part of a finite element mesh that behaves as a mesh

DESCRIPTION

       The  geo_domain class defines a container for a part of a finite element mesh.  This class
       re-describes the vertices, edges or faces in  a  compact  way,  i.e.  by  skipping  unused
       elements from the surrounding mesh.

IMPLEMENTATION NOTE

       The geo_domain class conserves the link to the original mesh such that fields defined on a
       geo_domain can inter-operate with fields defined on the surrounding mesh.