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math-ph2018
The first-order flexibility of a crystal framework
E. Kastis, S. C. Power
Four sets of necessary and sufficient conditions are obtained for the first-order rigidity of a periodic bond-node framework \C in R^d which is of crystallographic type. In particu…
math.OA2018
The norm closed triple semigroup algebra
Eleftherios Kastis
The w*-closed triple semigroup algebra was introduced by Power and the author in [19], where it was proved to be reflexive and to be chiral, in the sense of not being unitarily equ…