Mathematicians who were born or died on 21st October

Mathematicians born on this day:

1687 : Nicolaus(I) Bernoulli
1823 : Enrico Betti
1855 : Giovanni Guccia
1882 : Harry Vandiver
1893 : Bill Ferrar
1914 : Martin Gardner

Mathematicians who died on this day:

1881 : Eduard Heine
1969 : Wacław Sierpiński
1990 : Karl Aubert
2000 : Dirk Struik
2002 : Bernhard Neumann

Posters available   (Click on a link below)

Enrico Betti Eduard Heine Waclaw Sierpinski

A quotation for today

VandiverHarry S Vandiver (1882 - 1973)

It is not known if there are infinitely many Wilson primes. This question seems to be of such a character that if I should come to life any time after my death and some mathematician were to tell me that it had definitely been settled, I think I would immediately drop dead again.
[Wilson primes satisfy (p - 1)! = -1 mod p2.
5, 13, and 563 are the only Wilson primes less than 5 × 108 ]

Quoted in D MacHale, Comic Sections (Dublin 1993)

Another quotation by one of today's mathematicians.

JOC/EFR May 2017 School of Mathematics and Statistics
University of St Andrews, Scotland
university crest