CECM Colloquium

**Wednesday October 17, 2001
in K9509, SFU
**

3:30 - 4:30

Dr Chris Smyth, Edinburgh

**Title:**
"Pisot numbers and Coxeter graphs"

**Abstract:**
Pisot numbers have many special properties. For instance, they
are the only known numbers
bigger than 1 whose powers `tend to integers'.

The theme of this talk is the use of graphs to construct Pisot numbers. This leads to the construction of Pisot numbers with previously unknown properties, and gives insight into the structure of the set of all Pisot numbers.