2 papers
math-ph2018
Crystal flex bases and the RUM spectrum
Ghada Badri, Derek Kitson, Stephen C. Power
A theory of free spanning sets, free bases and their space group symmetric variants is developed for the first order flex spaces of infinite bar-joint frameworks. Such spanning set…
math.MG2014
The almost periodic rigidity of crystallographic bar-joint frameworks
G. Badri, D. Kitson, S. C. Power
A crystallographic bar-joint framework C is shown to be almost periodically infinitesimally rigid if and only if it is strictly periodically infinitesimally rigid and the rigid uni…