Willem de Sitter (May 6, 1872 – November 20, 1934) was a Dutch mathematician, physicist and astronomer. Born in Sneek, De Sitter studied mathematics at the University of ...
biographies and portraits of prize-winning astronomers of the 19th and 20th centuries
Willem de Sitter (1872-1934) ... JOC/EFR © April 2009. The URL of this page is: http://www-history.mcs.st-andrews.ac.uk/Mathematicians/Sitter.html