A proof of the molecular conjecture
Proceedings of the twenty-fifth annual symposium on Computational geometry
Highly connected molecular graphs are rigid in three dimensions
Information Processing Letters
Generic global rigidity of body-bar frameworks
Journal of Combinatorial Theory Series B
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We consider three-dimensional generic bar-and-joint realizations of squares of graphs. These graphs are also called molecular graphs due to their importance in the study of flexibility in molecules. The Molecular Conjecture, posed in 1984 by T.-S. Tay and W. Whiteley, indicates that determining rigidity (or, more generally, computing the number of degrees of freedom) of molecular graphs may be tractable by combinatorial methods. We show that the truth of the Molecular Conjecture would imply an efficient algorithm to identify the maximal rigid subgraphs of a molecular graph. In addition, we prove that the truth of two other conjectures in combinatorial rigidity (due to A. Dress and D. Jacobs, respectively) would imply the truth of the Molecular Conjecture.