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A straight-line realization of (or a
bar-and-joint framework on) graph G in Rd
is said to be globally
rigid if it is congruent to every other realization of G
with the same edge lengths.
A graph G is called globally rigid in Rd if every generic realization
of G is globally rigid.
We give an algorithm for
constructing a globally rigid realization of
globally rigid graphs in R2.
If G is triangle-reducible, which is a subfamily of
globally rigid graphs that includes
Cauchy graphs as well as Grünbaum graphs,
the constructed realization will also be
infinitesimally rigid.
Our algorithm is based on an inductive construction of
globally rigid graphs which uses
Henneberg 1-extensions and edge additions.
We show that vertex splitting, which is another well-known operation
in combinatorial rigidity, also preserves
global rigidity in R2.
Bibtex entry:
AUTHOR | = | {Jord{\'a}n, Tibor and Szabadka, Zolt{\'a}n}, |
TITLE | = | {Operations preserving the global rigidity of graphs and frameworks in the plane}, |
NOTE | = | {{\tt egres.elte.hu}}, |
INSTITUTION | = | {Egerv{\'a}ry Research Group, Budapest}, |
YEAR | = | {2006}, |
NUMBER | = | {TR-2006-16} |