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Generically Globally Rigid


A generically globally rigid graph in R^d is a graph for which every (equivalently, some) generic realization in R^d is globally rigid (Garamvölgyi et al. 2021).

A d-dimensional framework is a pair (G,p) where G=(V,E) is a graph with vertex set V and edge set E and p:V->R^d is a map that assigns a point in R^d to each vertex of G. The length of an edge uv in (G,p) is the Euclidean distance between p(u) and p(v). Call (G,p) a realization of G in R^d. The framework is said to be generic if the set of the coordinates of its points is algebraically independent over Q, and is said to be globally rigid if every other realization (G,q) of G in R^d in which corresponding edges have the same length is congruent to (G,p), i.e., the graph G and its edge lengths in (G,p) uniquely determine the pairwise distances of all vertices in (G,p).

If G is globally rigid in R^d on n>=d+2 vertices, then G is fully reconstructible in C^d (Garamvölgyi et al. 2021).

For generic global rigidity in the plane, Cong et al. (2026) gave deterministic polynomial-time algorithms to find a smallest edge set or vertex set whose deletion destroys global rigidity. Assigning positive integer deletion costs makes both optimization problems NP-hard, even when the input is globally rigid.


See also

Fully Reconstructible Graph

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References

Bernstein, D. I. and Gortler, S. J. "K_(5,5) is Fully Reconstructible in C^3." Submitted to Disc. Math., 2022.Cong, Y.; Xu, C.; and Zhao, Y. "Destroying Rigidity in the Plane." 28 Oct 2026. https://arxiv.org/abs/2610.38396.Garamvölgyi, D.; Gortler, S. J.; and Jordán, J. "Globally Rigid Graphs Are Fully Reconstructible." 10 May 2021. https://arxiv.org/abs/2105.04363.

Referenced on Wolfram|Alpha

Generically Globally Rigid

Cite this as:

Weisstein, Eric W. "Generically Globally Rigid." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/GenericallyGloballyRigid.html

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