Colloquium

Michael Baake, University of Bielefeld, Germany

The discovery of quasicrystals by Dan Shechtman in 1982
has shown that there are interesting systems beyond perfect
crystals with pure point diffraction spectra, and also that
we still have a rather limited understanding of what `order'
is supposed to mean, both mathematically and physically.

In this talk, basic structures with aperiodic order are
reviewed from the point of view of mathematical diffraction
theory, with focus on classic and paradigmatic examples.
The talk is directed towards a general mathematical audience.
Further details will later be discussed in the talk by
Uwe Grimm.