Duality in 19th and 20th Century Mathematical Thinking

Ralf Krömer is Professor of mathematics and its didactics at the Bergische Universität Wuppertal. His research focuses mainly on the history of mathematics from the late 17th to the 20th century. His research interests include in particular historical themes around Leibniz, Poincaré, the Bourbaki group, structural mathematics, and category theory, but also philosophical aspects of these topics as well as the use of the history of mathematics in its teaching.

Emmylou Haffner is a CNRS research scientist at the Institut des Textes et Manuscrits Modernes (École Normale Supérieure). Her research focuses on the history of mathematics in the 19th and 20th centuries, with particular interest in manuscripts and genetic criticism.

Ralf Krömer是Bergische Universität Wuppertal的數學及其教學法教授。他的研究主要集中在17世紀末至20世紀的數學歷史上。他的研究興趣包括萊布尼茨、庞加莱、布尔巴基小组、结构数学和范畴论等历史主题，以及这些主题的哲学方面，以及在教学中使用数学历史的方法。

Emmylou Haffner是École Normale Supérieure的Institut des Textes et Manuscrits Modernes的CNRS研究科学家。她的研究重点是19世纪和20世纪的数学史，特别关注手稿和遗传批评。