I miss him very much. Especially because doing mathematics with him was a lot of fun. His humor, his naturalness, his spontaneity were like a force of nature. And I was very lucky as I could receive his harsh criticisms directly in his mother language, and respond. And I always remember with joy the very long night we spent together, when we met at 6pm EST at the gate of a flight from JFK to Denver; coming from different places across the Atlantic, each had missed his connecting flight. For a technical problem, we then sat at the gate for four hours waiting for a replacement aircraft. We got to Denver at 4am MST, arriving in Boulder at 7am in time for breakfast. Yet he made it the most absolutely delightful trip for me. Ciao! Pino [For admin and other information see: http://www.mta.ca/~cat-dist/ ]