Et moi, ..., si javait so comment CD revenir. je One service mathematics bas rendered !be human race. It bas put common sense back n y semis point aile. JulesVeme where it belongs, on !be topmost shelf next to !be dusty canister labelled discarded nonsense. Erie T. Bell The series is divergent; therefore we may be able to do something wilh it O. Heaviside Mathematics is a tool for thought. A highly necessary tool in a world where both feedback and nonlineari- ties abound. Similarly, all kinds of parts of mathematics serve as tools for other parts and for other sci- ences. Applying a simple rewriting rule to the quote on the right above one finds such statements as: One ser- .. .; One service logic has rendered computer science vice topology has rendered mathematical physics .. .; One service category theory has rendered mathematics .. .. All arguably true. And all statements obtainable this way form part of the raison d8tre of this series.