Mathematics is the study of relationships between
numbers, between spatial configurations, and abstract structures. Traditionally
the subject is divided into arithmetic (which studies
numbers), geometry (which studies space),
algebra (which studies structures), analysis
(which studies infinite processes) and probability theory and
statistics (which is a load of poo).
My favourite mathematical chappie is Évariste Galois, who feverishly wrote a brilliant method of solving quintic equations the night before he was mortally wounded in a duel. He died aged 21 and has no grave.