- history of mathematics in the 19th and 20th centuries
- mathematisation of science, in particular the interactions between mathematics and physics
- historical epistemology
- historiography of mathematics in the 19th and 20th centuries
- history of mathematics in school and university teaching
Activities
- treasurer of the International Commission on the History of Mathematics (ICHM) since 2019
- editor of NTM - Zeitschrift für Geschichte der Wissenschaften, Technik und Medizin since 2017
- organisation of the symposion "The power of the historiography of science" during the 7th International Conference of the European History of Science Society (ESHS), September 2016, Prague, together with CHEN Zhihui (Paris) and Jiří Hudeček (Prague)
- Associate Editor of Historia Mathematica since 2016
- PostDoc (October 2014 to September 2015), research stays (March/April and September/October 2016) and associate member of the ERC-Projekt "Mathematical Sciences in the Ancient World. New Theoretical Approaches to the Sources and Socio-Political Issues of the Present Day" (SAW) directed by Karine Chemla (PI), Agathe Keller and Christine Proust (Paris 7 Diderot, SPHERE) since October 2011
- organisation of and talks at the workshop "Mathematik in Entwicklung" ("Developing mathematics" for students training to become school teachers) at the Hausdorff Research Institute for Mathematics (HIM) in Bonn in May 2014 and April 2016
- vice secretary of the work group "Mathematikgeschichte und Unterricht" (History of mathematics and teaching) of the Gesellschaft für Didaktik der Mathematik
- organisation of and talk at the international conference "Historiography of Mathematics in the 19th and 20th Centuries" in Wuppertal, March 20-22, 2013, together with Volker Remmert (Wuppertal) and Henrik Kragh Sorensen (Aarhus)
- talk at the Mainzer Mathe Akademie in September 2013
- review editor of Historia Mathematica (2011-2015)
- part of the international project 'Circulation des savoirs et pratiques algébriques et arithmétiques (1875-1945). Sources et échanges: France, Europe, États-Unis' (CaaFÉ, ANR-10-JCJC 0101) for young researchers (2010-2014)