'Et moi, ...- si j'avait su comment en revcnir. One service mathematics
has rendered the je n'y scrais point aile.' human race. It has put
common sense back where it belongs, on the topmost shclf next Jules
Verne to the dusty canister labdlcd 'discarded non- The series is
divergent; therefore we may be sense'. able to do something with it Eric
T. Bell O. Heaviside Mathematics is a tool for thought. A highly
necessary tool in a world where both feedback and non- linearities
abound. Similarly, all kinds of parts of mathematics serve as tools for
other parts and for other sciences. Applying a simple rewriting rule to
the quote on the right above one finds such statements as: 'One service
topology has rendered mathematical physics .. .'; 'One service logic has
rendered com- puter science .. .'; 'One service category theory has
rendered mathematics .. .'. All arguably true. And all statements
obtainable this way form part of the raison d'etre of this series.