[PDF]PLAYING POOL WITH PI (THE NUMBER PI FROM A BILLIARD POINT OF VIEW)G. GALPERIN Department of Mathematics & Computer Sciences, Eastern Illinois University, Charleston, IL 61920, USA E-mail: cfgg@ux1.cts.eiu.edu PLAYING POOL WITH π (THE NUMBER π FROM A BILLIARD POINT OF VIEW) Received December 9, 2003 DOI: 10.1070/RD2003v008n04ABEH000252 Counting collisions in a simple dynamical system with two billiard balls can be used to estimate π to any accuracy. π It’s i
