Fine structure of C-star-algebras associated to topological dynamics

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Kevin Aguyar Brix


DKK 350,000




Internationalisation Fellowships


Operator algebras are abstract objects introduced by Murray and von Neumann a century ago with the intention of providing a rigorous mathematical framework for the theory of quantum mechanics. Since then operator algebras has become an important independent research field which connects to many different aspects of pure mathematics. Topological dynamical systems coming, e.g., from oriented graphs generate a rich class of examples of operator algebras whose structure is reflected in the underlying dynamical system. Using a newly developed reconstruction theory, the aim of this project is to understand and answer long-standing and fundamental questions about such dynamical systems using operator algebraic tools.


Symbolic dynamics originated at the beginning of the 20th century as a way of modeling a broad class of physical systems with a specified discretized time evolution. However, some of the most fundamental questions, such as the existence of a deciding algorithm for when two symbolic dynamical systems are the same, remain unresolved. Operator algebras provides a new framework from which we can attack these resilient problems. This approach of bridging the two fields is promising as we have already seen a fruitful transportation of ideas over recent years.


University of Wollongong in Australia has some of the world’s leading experts investigating the connections between topological dynamical systems and operator algebras. I intend to be in close and continuous discussion with the members of the research group and initiate collaborative projects in order to develop new techniques and stay updated on the latest progress.

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