Math Encounters

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 e-mail mathencounters@momath.org.

Next presentation:

“‘Rithmetic Revisited” June 1 at 4:00 pm
with Carl Pomerance

“‘Rithmetic Revisited” June 1 at 7:00 pm
with Carl Pomerance

'Rithmetic Revisited

How could there be something we don’t know about arithmetic — didn’t we learn it all in third grade? But here’s a problem whose solution we don’t know: What is the fastest way to multiply? And another: How many different numbers appear in a large multiplication table? Dartmouth mathematician Carl Pomerance reveals the hidden mysteries of multiplication and addition in this surprising reexamination of grade-school math.

Get priority seating for Math Encounters!

Become a premium member (Plus, Squared, Exponential, Infinity) at momath.org/join and get priority seating for Math Encounters.*

Photography notice

By registering for a Math Encounters presentation, you agree that you may be photographed or videotaped by Museum staff and associates.

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 1-2 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!

Previous Math Encounters Presentations


• 2016 May 4 — Tom Verhoeff – Saving Face: Information Tricks for Life and Love
• 2016 Apr 6 — Jason Rosenhouse – What’s Behind Door Number Two?
• 2016 Mar 2 — Erik Demaine – Mathematical Magic 
• 2016 Feb 3 — Bob Bosch – Life is Beautiful 
• 2016 Jan 6 — Ingrid Daubechies – Mysteries at an Exhibit
• 2015 Dec 2 — Donald Saari – Mystery of the Masses
• 2015 Nov 4 – Gavin A. Schmidt – Chaos in the Climate
• 2015 Oct 7 – Robin Wilson – Lewis Carroll in Numberland
• 2015 Sept 2 – Benedict Gross - How Fast Does It Grow? Taming the Factorial Explosion
• 2015 Aug 5 – Po-Shen Loh – Massive Numbers: Hunting Big Game in the Wilds of the Integers
• 2015 July 1 – Alex Kontorovich - Fractal Beauty
• 2015 June 3 – Jürgen Richter-Gebert - Symmetry, Ornaments, and Computers
• 2015 May 6 – James McLurkin - Swarm Math: From wasps and wings to bots and bits
• 2015 April 1 – John Allen Paulos - A Mathematician Reads the Newspaper (and Its Descendants)
• 2015 March 4 – Manjul Bhargava – Poetry, Drumming, and Mathematics
• 2015 Jan 7 – William Dunham – On the Shoulders of Giants
• 2014 Dec 3 – Chaim Goodman-Strauss – Shaping Surfaces
• 2014 Nov 5 – Mercedes Siles Molina – Cooking Up Math
• 2014 Oct 1 – David Swart – Peeling the World
• 2014 Sept 3 - Eitan Grinspun – Movie Magic
• 2014 Aug 6 – Mike Naylor – Naked Geometry
• 2014 July 2 – Laura Taalman – Making Mathematics Real

• 2014 June 4 – Michael Orrison – Change of Perspective
• 2014 May 7 – Tadashi Tokieda – Toy Models
• 2014 April 2 – Jennifer Chayes – The Mathematics of Networks
• 2014 March 5 – Kenneth Golden – Modeling the Melt
• 2014 February 5 – Bryna Kra – Patterns and Disorder
• 2014 January 8 – Tim Chartier – Linear Thinking
• 2013 December 4 – Art Benjamin – Secrets of Mental Math
• 2013 November 6 – Tom Banchoff – Encountering Dalí in the Fourth Dimension
• 2013 October 2 – Brian Greene – String Theory and the Mathematics of Hyperspace
• 2013 September 4 – Alissa S. Crans – A Surreptitious Sequence
• 2013 August 7 – Terry Tao – The Cosmic Distance Ladder
• 2013 July 3 – Robert Lang – From Flapping Birds to Space Telescopes
• 2013 June 5 – Matthew Brand – Calculated Deceptions
• 2013 May 1 – Danny Goroff – Chance, Choice, & Children
• 2013 April 3 – Jim Tanton – Laundry Math
• 2013 March 6 – Tony DeRose – Math in the Movies
• 2013 February 6 – Doris Schattschneider – Ingenious Mathematics
• 2013 January 2 – Amy Langville – Random Search, Ordered Results
• 2012 December 5 – Steven Strogatz – Doing Math in Public
• 2012 October 3 – John D. Barrow – Grabbing the Analytical Edge
• 2012 September 5 – Parag Chordia – Harmony From Numbers
• 2012 July 31-August 1 – Carlo Séquin – The Topology of Twisted Toroids
• 2012 July 11 – Peter Winkler – Intuition Gone Awry
• 2012 June 6 – Colin Adams – Blown Away
• 2012 May 2 – Joseph O’Rourke – Shape Transformers
• 2012 April 4 – Dr. Günter M. Ziegler – Proofs from The BOOK
• 2012 March 7 – Peter Norvig – ABC Easy as 123
• 2012 February 1 – Jeff Weeks – The Shape of Space
• 2012 January 4 – Craig Kaplan – Revolution and Evolution in Math and Design
• 2011 December 7 – Colin Wright – Five Balls, Two Hands: The Patterns of Juggling
• 2011 November 2 – Ken Perlin – Creating the Illusion of Life with Math & Programming
• 2011 October 5 – Sarah Greenwald – Mathematical Morsels from The Simpsons and Futurama
• 2011 September 6-7 – Keith Devlin – Fibonacci & the Golden Ratio Exposed
• 2011 July 6 – Angela Vierling-Claassen – Points to Paints
• 2011 June 8 – Frank Morgan – Soap Bubbles and Mathematics
• 2011 May 4 – Paul Hoffman – The Man Who Loved Only Numbers
• 2011 April 7 – Scott Kim – Symmetry, Art, & Illusion
• 2011 March 3-4 – Erik Demaine – The Geometry of Origami

*For Math Encounters priority seating, premium members must arrive before 3:45 pm for the afternoon presentation and 6:30 pm for the evening presentation.