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A conference was held June 16-20, in Columbus, Ohio, to honor Bartle Professor of Mathematics Ross Geoghegan on the occasion of his 70th birthday. Titled the conference honored the numerous mathematical contributions Geoghegan has made. He was one of the first mathematicians to use topological techniques to study groups and his textbook, Topological methods in group theory,’’ is one of the standard references in the field.

Conference organizers will publish conference proceedings in the LMS Lecture Notes in Mathematics series.