On Kato's inequality for the Weyl quantized relativistic Hamiltonian.
On path integration on noncommutative geometries
We discuss a recent approach to quantum field theoretical path integration on noncommutative geometries which imply UV/IR regularising finite minimal uncertainties in positions and/or momenta. One class of such noncommutative geometries arise as `momentum spaces' over curved spaces, for which we can now give the full set of commutation relations in coordinate free form, based on the Synge world function.
On the associative Nijenhuis relation.