We describe a class of non-local Dirichlet forms on ultra-metric spaces and obtain various upper and lower estimates of the corresponding heat kernels.
Links:
[1] http://www.mpim-bonn.mpg.de/taxonomy/term/39
[2] http://www.mpim-bonn.mpg.de/node/3444
[3] http://www.mpim-bonn.mpg.de/node/7138