Topological Invariants for Projection Method Patterns
Author | : Alan Forrest |
Publisher | : American Mathematical Soc. |
Total Pages | : 137 |
Release | : 2002 |
ISBN-10 | : 9780821829653 |
ISBN-13 | : 0821829653 |
Rating | : 4/5 (53 Downloads) |
Book excerpt: This memoir develops, discusses and compares a range of commutative and non-commutative invariants defined for projection method tilings and point patterns. The projection method refers to patterns, particularly the quasiperiodic patterns, constructed by the projection of a strip of a high dimensional integer lattice to a smaller dimensional Euclidean space. In the first half of the memoir the acceptance domain is very general - any compact set which is the closure of its interior - while in the second half the authors concentrate on the so-called canonical patterns. The topological invariants used are various forms of $K$-theory and cohomology applied to a variety of both $C DEGREES*$-algebras and dynamical systems derived from such a p