ion ordering.
  specnd         - Spectral nested dissection ordering.
  gsnd           - Geometric spectral nested dissection ordering.
  metisnd        - Nested dissection ordering from Metis.
  analyze        - Predict fill, opcount, etc. for an elimination ordering.

<b><u>Meshes and graph generators.</u></b>
  meshes.mat     - Three sample meshes with coordinates:
    Eppstein     - A 2D finite-element mesh with 547 nodes.
    Smallmesh    - A 2D finite-element mesh with 136 nodes.
    Tapir  