Background: pure mathematics, with emphasis on algebra and geometry (master in 1986)
Doctoral dissertation (1992): “Lines in 3-space: isotopy, chirality and weaving patterns” (combinatorial geometry; algebra; (oriented) matroids; knot theory and projective geometry)
Major topics of interest from 1992 till 2007 (dormant now, yet not completely absent): computational geometry; (structural) rigidity; kinematics of mechanisms (instant centers, singularities,…); combinatorics (graphs, oriented matroids, lattice theory).
Major topics of interest since 2007: projective geometry and its applications, mainly in computer vision and 3D scanning (models and procedures for calibration of 2D-cameras, range sensors, laser scanners,…; ego-motion and pose determination; minimal solvers; extrinsic calibration; …)
Science communication (so far in Dutch): a prime number book for a great audience; keynote lectures on surprising mathematics, blogposts “wiskunde is sexy”, articles in popularizing magazines (Eos, Pythagoras,…), MathsJam,...
International contacts: Henry Crapo (CAMS/EHESS, Frankrijk); Walter Whiteley (Department of Mathematics and Statistics, York University, Canada); Henri Laurie (Department of Applied Mathematics, University of Capetown, South-Africa); Marek Kraft, Adam Schmidt en Piotr Skrzypczynski (Poznan University of Technology, Poland); Helder Araujo (Department of Electrical and Computer Engineering, University of Coimbra, Portugal)