Mathematicians Of The Day

29th October

On this day in 1675, the integral symbol was first used by Gottfried Leibniz in an unpublished manuscript, Analyseos tetragonisticae pars secunda [Second part of analytical quadrature].

Click on for a poster.

Quotation of the day

From Jean d'Alembert
Algebra is generous: she often gives more than is asked for.
Quoted in D MacHale, Comic Sections (Dublin 1993)