Let a Graph have exactly Edges, where is the number of Vertices in . Then is ``generically'' Rigid in Iff for every Subgraph of having Vertices and Edges.

**References**

Laman, G. ``On Graphs and Rigidity of Plane Skeletal Structures.'' *J. Engineering Math.* **4**, 331-340, 1970.

© 1996-9

1999-05-26