  This article presents the basis of a theory of entanglement. We begin with a
classical theory of entangled discrete measures in Section~1. Section~2 treats
quantum mechanics and discusses the statistics of bounded operators on a
Hilbert space in terms of context coefficients. In Section~3 we combine the
work of the first two sections to develop a general theory of entanglement for
quantum states. A measure of entanglement called the entanglement number is
introduced. Although this number is related to entanglement robustness, its
motivation is not the same and there are some differences. The present article
only involves bipartite systems and we leave the study of multipartite systems
for later work.
