  In these notes we propose a setting for fuzzy computing in a framework
similar to that of well-established theories of computation: boolean, and
quantum computing. Our efforts have been directed towards stressing the formal
similarities: there is a common pattern underlying these three theories. We
tried to conform our approach, as much as possible, to this pattern. This work
was part of a project jointly with Professor Vittorio Cafagna. Professor
Cafagna passed away unexpectedly in 2007. His intellectual breadth and
inspiring passion for mathematics is still very well alive.
