A sufficient connectivity condition for rigidity and global rigidity of linearly constrained frameworks in R²

Abstract

We study the bar-and-joint frameworks in R2 such that some vertices are constrained to lie on some lines. The generic rigidity of such frameworks is characterised by Streinu and Theran (2010). Katoh and Tanigawa (2013) remarked that the corresponding matroid and its rank function can be characterised by using a submodular function. In this paper, we will transfer this characterisation of the rank function to the form of the value of a “1-thin cover” and obtain a sufficient connectivity condition for rigidity and global rigidity of these frameworks analogous to the results of Lovász and Yemini (1982).