Research interests: Noncommutative analysis and noncommutative integration; perturbation theory; noncommutative and vector-valued harmonic analysis.
Best publications: (i) Operator-Lipschitz functions in Schatten-von Neumann classes --- Acta Math. (ii) Spectral flow is the integral of one forms on the Banach manifold of self adjoint Fredholm operators --- Adv. Math. (iii) Unbounded Fredholm modules and double operator integrals --- Crelle J.