Robert V. Moody

Abstract:   The discovery of physical quasicrystals has reinvigorated the subject of almost-periodic order. One of the most striking features of this aperiodic world is the prevalence of beautiful pure point diffraction images.

This talk surveys some of the various examples of this phenomenon, from tilings to non-crystallographic root systems, and shows how the subject fits into the theory of harmonic analysis on locally compact Abelian groups.

There are lots of nice pictures!

Here are some directions to Northeastern University. Lake Hall and Nightingale Hall can be best accessed from the entrance on the corner of Greenleaf Street and Leon Street. The two halls are connected, with no well-defined boundary in between. In particular, 509 Lake Hall is on the same corridor as 544 Nightingale Hall.

There is free parking available for people coming to the colloquium at Northeastern's visitor parking. The entrance is from Columbus Avenue, right next to the parking garage.