'Et moi, .... si j'avait su comment en revenir, One service mathematics has rendered the je n'y semis point all: human race. It has put common sense back 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 inearities abound. Similarly, all kinds of parts of mathematics serve as tools for other parts and for other sciences. Applying a...