This is work with Jacques Rougemont (Geneva) and Tsvi Tlusty (Ulsan).
The greater context is an attempt to bring the language of mathematics
closer to that of biology, where there exist lots of data but few
conceptual methods. Considering the evolution of functional proteins (which
do something useful), we view them as amorphous solids. It turns out
that describing the protein as a (finite) random network of
connections, which are changed through evolution, a
Green's function approach can explain many properties of proteins
which biologists have observed. The talk needs no previous knowledge of
biological concepts.