Denos C. Gazis
Socio-Economic Planning Sciences
The conditions for rotational invariance of a Born-von Karman lattice model are re-examined. It is found that the Born-Huang conditions for rotational invariance are necessary but not sufficient. Some additional conditions are obtained which, together with the Born-Huang conditions, constitute a set of necessary and sufficient conditions. © 1966 The American Physical Society.
Denos C. Gazis
Socio-Economic Planning Sciences
Denos C. Gazis, Richard F. Wallis
Acta Mechanica
Denos C. Gazis
Science
Denos C. Gazis, Leslie C. Edie
Proceedings of the IEEE