Current interests include: - Position space renormalization (work with N. Nikolov and R. Stora, Rev. Math. Phys. 26:4 (2014) 1430002, and CERN-TH-PH/2015-016; see also: Reltivistic causality and position space renormalization, Nucl. Phys. B 912 (2016) 79-87; arXiv:1611.08695).
- Hyperlogarithms and periods in Feynman amplitudes (Bures-sur-Yvette preprint: IHES/P/16/02); arXiv:1611.09323 [math-ph].
- Applications of (Connes' approach to) noncommutative geometry to the standard model of particle physics and its possible extension (work in progress with Michel Dubois-Violette from the Univ. Paris Sud, Orsay).
- I have a long term interest in the history of physics and mathematics
(arXiv: physics/0503235, 0504179; 0709.1387; 1505.04262; 1610.05749).