*Ramsey Theory*:

from the happy-ending theorem to Graham’s number

*Ramsey Theory*:

from the happy-ending theorem to Graham’s number

**Thursdays at 6:30 pm ET (New York)
May 13, May 20, and June 3**

**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.

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.

**“The Pigeonhole Principle, on Steroids”
Thursday, May 13**

Ramsey numbers, Erdős’s aliens, and the happy-ending theorem. Registration has closed for this session.

**“Coloring Infinite Combs”**

**Thursday, May 20**

Van der Waerden’s theorem and beyond. Registration has closed for this session.

**“Absurdly Extravagant Upper Bounds, and the wizards who shrink them”**

**Thursday, June 3**

Learn about absurdly extravagant upper bounds and the wizards who shrink them: Ackermann, Graham, Shelah, and others. Click here to register for this individual session.

These are **live-streamed** events. Occasional video recordings are made available for a fee at videos.momath.org.