Math Encounters

Note: For the months of January – April 2022, Math Encounters
will take place on the second Wednesday of the month.

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

Next up

Math Encounters:

“Tag Deal: Discrete Chaos in a Deck of Cards”

featuring Barry Cipra

Wednesday, January 12
4:00 pm and 7:00 pm ET (New York)


Insanity, it’s sometimes said, is doing the same thing over and over and expecting different results.  Mathematics, it might be said, often involves doing the same thing over and over and actually achieving different results.  Join freelance mathematics writer Barry Cipra for some mathematical insanity with Tag Deal, a game of unpredictable repetition.

Special introduction by Laura Helmuth, Scientific American Editor-in-Chief.

This event will be hosted in person at MoMath (11 E 26th Street in Manhattan) and broadcasted online.

Photography notice

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.

Books by the speakers

We are happy to offer books edited or authored by Math Encounters speakers through our online shop.

Math Encounters available on YouTube and DVD

Math Encounters presentations are generally posted to our YouTube page within one to two months of filming.  Due to copyright issues, some presentations may not be reproduced on the internet.  Presentations posted online are also available for purchase via our online shop.  Click here to purchase yours today!

Presented by the Simons Foundation and the National Museum of Mathematics.

Please note that all children under the age of 16 must be accompanied by an adult.