Abstract 3-Rigidity and Bivariate $C_2^1$-Splines I: Whiteley's Maximality Conjecture
@article{Clinch2019Abstract3A, title={Abstract 3-Rigidity and Bivariate \$C\_2^1\$-Splines I: Whiteley's Maximality Conjecture}, author={Katie Clinch and Bill Jackson and Shin-ichi Tanigawa}, journal={arXiv: Combinatorics}, year={2019} }
A long-standing conjecture in rigidity theory states that the generic 3-dimensional rigidity matroid is the unique maximal abstract 3-rigidity matroid (with respect to the weak order on matroids). Based on a close similarity between the generic 3-dimensional rigidity matroid and the generic $C_2^1$-cofactor matroid from approximation theory, Whiteley made an analogous conjecture in 1996 that the generic $C_2^1$-cofactor matroid is the unique maximal abstract 3-rigidity matroid. We verify…
3 Citations
Bar-and-joint rigidity on the moment curve coincides with cofactor rigidity on a conic
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- 2021
. We show that, for points along the moment curve, the bar-and-joint rigidity matroid and the hyperconnectivity matroid coincide, and that both coincide with the C d − 2 d − 1 -cofactor rigidity of…
Maximal Matroids in Weak Order Posets
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Let X be a family of subsets of a finite set E. A matroid on E is called an X matroid if each set in X is a circuit. We consider the problem of determining when there exists a unique maximal X…
Abstract 3-Rigidity and Bivariate $C_2^1$-Splines II: Combinatorial Characterization.
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- 2019
We showed in the first paper of this series that the generic $C_2^1$-cofactor matroid is the unique maximal abstract $3$-rigidity matroid. In this paper we obtain a combinatorial characterization of…
References
SHOWING 1-10 OF 12 REFERENCES
Generating Isostatic Frameworks
- Philosophy
- 1985
La litterature d’ingenierie renferme bon nombre de techniques pour construire de grandes charpentes statiquement rigides a partir de plus petites. Malheureusement, certains de ces principes sont…
Homology of smooth splines: generic triangulations and a conjecture of Strang
- Mathematics
- 1988
For A a triangulated d-dimensional region in Rd, let Sr (A) denote the vector space of all cr functions F on A that, restricted to any simplex in A, are given by polynomials of degree at most m. We…
Vertex Splitting in Isostatic Frameworks
- Art
- 1990
On demontre que des divisions de sommet le long de 0, 1 ou 2 aretes d'une charpente de barres et de joints dans I'espace tridimensionnel respectent I'independance pour p resque toutes les positions…
On Generic Rigidity in the Plane
- Mathematics
- 1982
Let G be a graph. Let us place the points of G in “general” position in the plane and then replace its edges by rigid bars (with flexible joints). We would like to know if the resulting structure is…
The Maximum Matroid of a Graph
- Mathematics
- 2019
The ground set for all matroids in this paper is the set of all edges of a complete graph. The notion of a {\it maximum matroid for a graph} $G$ is introduced, and the existence and uniqueness of the…
On Spaces of Infinitesimal Motions and Three Dimensional Henneberg Extensions
- MathematicsDiscret. Comput. Geom.
- 2014
Some structure theorems for these spaces of infinitesimal motions arising naturally in the rigidity theory of bar and joint frameworks are proved and some special cases of a long standing conjecture concerning Henneberg extensions and generically rigid graphs are deduced.
On Abstract Rigidity Matroids
- MathematicsSIAM J. Discret. Math.
- 2010
This paper provides a combinatorial characterization of abstract rigidity matroids in any dimension and shows that in dimension 3, however, there exists a 1-extendable abstract rigsidity matroid that is not a generic rigidityMatroid.