Lattices via cyclotomic fields in dimensions 2 and 4. (English) Zbl 1216.94058
From the text: In this paper we present a method for evaluating the center density of algebraic lattices in dimensions 2 and 4 via the ring of algebraic integers of the cyclotomic fields of \(\mathbb Q(\xi_ n)\), where \(n\) is a positive integer. With this method we reproduce rotated versions of \(\Lambda_ 2\) and \(\Lambda_ 4\).