The study of differential operators within the framework of Lie groups offers a profound gateway into understanding symmetry, geometry and representation theory. At its core, this area investigates ...

The Dunkl transform is a sophisticated generalisation of the classical Fourier transform, incorporating differential‐difference operators that are defined in relation to reflection groups. This ...

We generalize a theorem of Coifman, Lions, Meyer and Semmes to higher-order differential operators (also with variable coefficients). Moreover, we present a direct, elementary proof of a duality ...