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