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

Math Encounters:
"The Lonely Runner: an unsolved mystery of mathematics"

featuring Matthias Beck

Wednesday, April 13 at 7:00 pm ET (New York)

(in person)

The Lonely Runner Conjecture is an (in)famous open problem in combinatorial number theory: if n runners with different (constant) speeds move around a circular track of length 1, then for each runner there will be a time when they have distance at least 1/n to the others.  How did this problem come about, how is it related to the approximation of real numbers by rationals, and how can we visualize this problem using two- or three-dimensional shapes?  Join mathematician Matthias Beck as we explore this fascinating mathematical mystery.

Special introduction by Nathan Kaplan, Associate Professor of Mathematics at University of California, Irvine.

This event will take place in person at MoMath at 11 East 26th Street.

This page is for the 7:00 pm ET (New York) in-person session.  Click here to register for a live-streamed session or for the 4:00 pm ET (New York) in-person session instead.

All in-person seats are available on a first-come, first-served basis.

Please arrive 15 to 30 minutes before the event start time to complete registration.

In light of the current COVID-19 situation, MoMath is temporarily suspending the provision of food during Math Encounters.

Note that masks must be worn at all times inside the Museum and that all visitors ages five and up must show acceptable proof of full vaccination against COVID-19.  (Note: MoMath does not accept digital images or photocopies of vaccination cards.)

By registering for a Math Encounters presentation, you acknowledge that you may be photographed or videotaped by Museum staff and associates and agree to abide by the MoMath General Policies for Events and Photograph Release.

Math Encounters is MoMath's popular free public presentation series celebrating the spectacular world of mathematics, produced with support from the Simons Foundation.

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

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

April 13, 2022 7:00 pm   through   8:30 pm
National Museum of Mathematics
11 E. 26th St.
New York, NY 10010
United States
Phone: 212-542-0566

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