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

Ramsey Theory:
from the happy-ending theorem to Graham’s number

"Absurdly Extravagant Upper Bounds, and the wizards who shrink them"

Thursday, June 3 at 6:30 pm ET (New York)

Appropriate for ages 14 and up


In honor of Ronald Graham, who passed away last summer, Paul Zeitz presents a three-part mini-course that explores Ramsey Theory, the study of order within randomness — and the mathematical glue of the long friendship between Graham and the eccentric genius Paul Erdős.

In this final session of a three-part mini-course, learn about absurdly extravagant upper bounds and the wizards who shrink them: Ackermann, Graham, Shelah, and others.

While registration for standalone sessions is allowed and catch-up notes will be provided, attending all three sessions is strongly encouraged for the best possible experience.  Note that no refunds will be offered.  To register for all three sessions, click here.

This is a live-streamed event.  Occasional video recordings are made available for a fee at

June 3rd, 2021 from  6:30 pm to  8:00 pm
MoMath Online
United States
Event Fee(s)
Free registration (while supplies last) $0.00
$15 donation to support families in need $15.00