ABSTRACT

Chapter 10

Lipschitz Algebras

10.1 The algebras Lip

(X)

The quantum version of a metric space is analogous to the quantum ver-

sions of topological and measure spaces. In each case there is a Hilbert

space generalization of the algebra of scalar-valued maps on such an ob-

ject which preserve the relevant structure. The topological and measure

theoretic categories involve the algebras C(X) and L

(X); in the metric

case the appropriate algebra is Lip

(X).