Ludolphian Number

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Ludolphian Number

 

(also Ludolfs number), the approximate value of π (ratio of the circumference of a circle to its diameter) to 32 decimal places worked out by the Dutch mathematician Ludolph Van Ceulen (1540-1610) and published after his death in 1615. The number π itself is sometimes called, without any basis, the Ludolphian number.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.