Our good colleague and friend Zoltán Ésik passed away suddenly yesterday afternoon in the hotel room where he was staying with his wife during a visit to our group at Reykjavik University. He had delivered a survey talk at Reykjavik University on the Equational Logic of Fixed Point Operations on Tuesday and we were making plans for the coming days.
Zoltán was a scientist of the highest calibre; he was one of the prime movers in the monumental development of Iteration Theories, amongst many other achievements. He had served the EATCS as a member of its Council for many years, had recently been named as one of the 2016 EATCS Fellows and he had been a member of the Presburger Award Committee for the last two years.
There is much more to be said about his scientific achievements and warm personality, but this will have to wait for better times.
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