Friday, January 2, 2015


This is a short update on the post called "particles in quantum gravity",
there were interesting comments and rather than answering them in the
blog i just want to point to a long and detailed talk which I gave in the
Hausdorff Institute in Bonn in December and which is now available on YouTube.

In any case this is a good occasion to wish you all a

                      HAPPY NEW YEAR 2015!