Et mai . ..., si j'avait su comment en revenir. One service mathematics
has rendered the human race. It has put common sense back je n'y serais
point aIIe.' Jules Verne where it belongs, on the topmost shelf next to
the dusty canister labelled '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.