The algebraic geometry of motions of bar-and-body frameworks
SIAM Journal on Algebraic and Discrete Methods
Construction of self-dual graphs
American Mathematical Monthly
Handbook of discrete and computational geometry
Constraining Plane Configurations in Computer-Aided Design: Combinatorics of Directions and Lengths
SIAM Journal on Discrete Mathematics
Combinatorial characterization of the Assur graphs from engineering
European Journal of Combinatorics
Directed graphs, decompositions, and spatial linkages
Discrete Applied Mathematics
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In our previous paper, we presented the combinatorial theory for minimal isostatic pinned frameworks-Assur graphs-which arise in the analysis of mechanical linkages. In this paper we further explore the geometric properties of Assur graphs, with a focus on singular realizations which have static self-stresses. We provide a new geometric characterization of Assur graphs, based on special singular realizations. These singular positions are then related to dead-end positions in which an associated mechanism with an inserted driver will stop or jam.