Online registration is closed for this event. If available, tickets on the day of the event may incur an additional charge.

Math Encounters: "Irrational Investigation: Why Pi Sometimes Equals 4" with Cornelia Van Cott (4:00 pm)

Most of your mathematical life, you've known that pi is an irrational number somewhere between 3.1 and 3.2.  But if we exchange the usual notion of distance in two-dimensional space for other notions, pi can be any of an infinite number of different values.  What are these values?  You'll be surprised at the twists and turns we encounter when we leave the safety of traditional distance measures for these uncharted territories.

Special introduction by Paul Zeitz, University of San Francisco Professor of Mathematics and Co-Founder and Chairman of the Board of Proof School.

This page is for the 4:00 pm session. Click here to register for the 7:00 pm session instead.

Light refreshments will be served after the 4:00 pm session and at 6:30 pm in advance of the second session.

Math Encounters is a public presentation series celebrating the spectacular world of mathematics, presented by the Simons Foundation and the National Museum of Mathematics.

For further information, call the National Museum of Mathematics at 212-542-0566 or e-mail

Please check our online shop for books by Math Encounters presenters.

September 4, 2019 4:00 pm   through   5:30 pm
National Museum of Mathematics
11 E. 26th St.
New York, NY 10010
United States
Phone: 212-542-0566