A C*-algebra associated with dynamics on a graph of strings

Abstract

A C*-algebra $\mathfrak{E}$ associated with a dynamical system on a metric graph is introduced. The system is governed by the wave equation and controlled from boundary vertices. Algebra $\mathfrak{E}$ is generated by the so-called {\it eikonals}, which are self-adjoint operators related with reachable sets of the system. Its structure is the main subject of the paper. We show that $\mathfrak{E}$ is a direct sum of "elementary blocks". Each block is an algebra of operators multiplying ${\mathbb{R}}^n$-valued functions by continuous matrix-valued functions of special kind. The eikonal algebra is determined by the boundary inverse data. This shows promise of its possible applications to inverse problems.

Cited by in corpus (1)

• Canonical form of $C^{\ast }$-algebra of eikonals related to the metric graph