Paul du Bois-Reymond
was born 186 years ago
2nd December 1831

Paul du Bois-Reymond discovered a continuous function whose Fourier series diverges at a point (and in fact at a dense set of points).

Find out more at:
http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Du_Bois-Reymond.html