Ok, I haven't so much as <I>looked</I> at a calculus or geometry book in nearly a decade. I don't remember much.<BR><BR>Anyway, I need to find a solution for a programming problem we have at work. I ...

It is a frequently used, fruitful idea in operator theory that studying general operators, we relate them to special ones and then exploit this connection. In the present paper isometries are invoked ...