Abstract. 
I will mostly talk about vanishing noise limit of diffusions near heteroclinic 
networks, at various time scales, and related issues.  This is a continuation 
of my September 20 seminar but since in that talk I ended up mostly 
discussing one concrete diffusion exit problem, this talk can be viewed 
as an essentially independent one. Joint work with Zsolt Pajor-Gyulai 
and Hong-Bin Chen.