And of course what about the zero-divisors conjecture? The tendency now would be to look for counter examples also for that, but where to look? As Giles Gardam pointed out, his group does satisfy the zero divisors conjecture, so where should we look for a counter example?

We see that there is yet a lot to be done. And that is a good thing. ]]>

The Hebrew University of Jerusalem offered it for free for a few days for the International Day of Women in Science

]]>Sure, Gil, I remember that seminar. That was the first time that I’ve met Yuval, you were my student earlier in a number theory course. And you are right, both Kaplansky and Jacobson visited Jerusalem, which really meant visiting Amitsur, Jacobson came quite a few times.

]]>Dear Avinoam, thanks for sharing these memories. There is a story related to you, me and Kaplansky: Namely, Yuval Flicker and I took a reading seminar with you on Kaplansky’s book “commutative rings”. I suppose that Both Kaplansky and Jackobson, visited the Hebrew University in my student years, but I don’t remember them.

]]>And speaking about people that we know, I well remember the discovery by Segev and Rips of groups without the unique product property. Segev started out as a Ph.D. student under the guidance of Rips, later he preferred to transfer to me, and naturally I am proud to have had such a student. So I guess I was one of the first people to hear about their breakthrough, they even consulted me about their paper. Not about the mathematics, I had nothing to do with that, just about the form of the paper. ]]>