Leonhardi Euleri Opera omnia: Editing the works and correspondence of Leonhard Euler

Abstract

The paper gives an overview on the history and present state of the edition of the complete works of Leonhard Euler (1707–1783). After several failed initiatives in the 19th century, the project began in 1907 with the edition of Euler’s printed works. The works were divided into three series: I. Mathematics (29 volumes); II. Mechanics and Astronomy (31 volumes); and III. Physics and Miscellaneous (12 volumes). After several ups and downs due to two World Wars and economic problems, the publication of the printed works with a total of 72 volumes is nearly finished. Only two volumes on perturbation theory in astronomy are still missing. The publication of series IV (manuscripts and correspondence) started in 1967 as a joint project of the Swiss and the Soviet academies of sciences. The manuscript edition was postponed, and the project focussed on Euler’s correspondence which contains approximately 3000 letters, 1000 of them written by Euler. The correspondents include famous mathematicians of the 18th century like d’Alembert, Clairaut and the Bernoullis, but also many less-known people with whom Euler corresponded on a great variety of subjects. A major problem is to find and to finance appropriate editors who are able to read French, Latin, and the old German handwriting, and who are acquainted with history, culture and science of the 18th century. During the last 50 years, the editors gathered copies or scans of most of the preserved Euler’s letters. The original letters addressed to Euler were made available to the editorial group in Switzerland by the Russian Academy of Sciences before World War I, and before their restitution in 1947 the editors made fairly good photographs that are now an important part of the material basis of the edition. Each volume of the letter series (VIA) contains Euler’s correspondence with one or more of his contemporaries, presented in a chronological order. Up to the present day, four volumes of the correspondence have been published, in addition to an inventory of all known letters to and from Euler, including short summaries and useful information about the date, language and location of the existing copies, and former publication. Four more volumes are in progress and will be published in 2016 or 2017. The remaining letters that are not intended for publication in the printed volumes are planned to be made available in an online edition.