Dear Category Theorists, As one of the local organizers, I want to invite you to Samuel Eilenberg Centenary Conference to be held in Warsaw, on July 22-26, 2013. You can read the Preliminary Announcement below. The web page of the Conference is eilenberg100.ptm.org.pl If you have any questions concerning the Conference, you can email me directly. I hope to see many of you in Warsaw next summer. Best regards, Marek Zawadowski Samuel Eilenberg Centenary Conference Warszawa (Warsaw), Poland, July 22-26, 2013 Preliminary Announcement Samuel Eilenberg, one of mathematicians who shaped 20th century mathematics and made important contributions to theoretical computer science, was born in Warsaw on September 30, 1913. The Centenary Conference will be held in the city of his birth July 22-26, 2013. The intention is to cover all the areas of Eilenberg's great contributions: topology, category theory and computability. The categorical viewpoint developed by Eilenberg and his collaborators lies behind many recent developments, thus the conference will be of relevance to a large body of current research in mathematics. The program of the Conference will consist of plenary lectures and contributed talks covering the wide scope of Eilenberg's mathematical legacy. Some historical materials will be presented to illustrate social context of his life. The conference venue will be the old campus of the University of Warsaw, Alma Mater of Samuel Eilenberg. Already as a student Eilenberg was one of the most active members of the Warsaw topology group - he left Warsaw in April 1939, thus escaping the Holocaust. After several short employments at institutions in the USA, in 1947 Eilenberg settled at Columbia University, where he stayed until retirement in 1982. He was a member of the Polish and American Mathematical Societies and of the Polish Academy of Sciences. Samuel Eilenberg was an extraordinary personality; he was also a famous collector and expert in Southeast Asian art. He donated his impressive collection to the Metropolitan Museum of Art in New York. The Conference is organized by the University of Warsaw, Polish Mathematical Society and the Institute of Mathematics of the Polish Academy of Sciences in collaboration with the American Mathematical Society and Columbia University. On the occasion of the conference a special volume of Fundamenta Mathematicae will appear, the journal in which Eilenberg published many papers, including his first (in 1934) and the last (in 1988) topological papers. The First Announcement will be distributed later in Fall . The webpage of the conference is: eilenberg100.ptm.org.pl . For more information please contact the secretary of the local organizing committee Marek.Zawadowski@mimuw.edu.pl . Eric Friedlander, President of the American Mathematical Society Stefan Jackowski, President of the Polish Mathematical Society Ioannis Karatzas, Chair of the Department of Mathematics, Columbia University Feliks Przytycki, Director of the Institute of Mathematics of the Polish Academy of Sciences Andrzej Tarlecki, Dean of the Faculty of Mathematics, Informatics and Mechanics, University of Warsaw [For admin and other information see: http://www.mta.ca/~cat-dist/ ]