In memoriam: Jonathan Rogawski

Jonathan Rogawski is no more. In loving memory, his friends and collaborators and admirers have contributed to this garland of articles that you will find in the pages to follow. He was of course a gifted mathematician, one of the earliest workers on the Langlands Program, but much more. He wrote papers, textbooks, supervised students, and served for many years with great distinction as an editor for the Pacific Journal of Mathematics.