I recently ran across a sheaf of papers brought back last spring from the trip north for a stint as guest lecturer ... .

There was little time to answer  during my talks, but in the event that some of those students are still reading here -- maybe I could respond in the hope that by so doing it may answer questions others may have had over time.

Besides, it helps to keep my mind off the Norwegian tragedy, and the 9th fatal shooting of the week here in the place where I live --

It's difficult to think of anything else ... .