Hans Duistermaat's contributions to Poisson geometry
  Hans Duistermaat was scheduled to lecture in the 2010 School on Poisson Geometry at IMPA, but passed away suddenly. This is a record of a talk I gave at the 2010 Conference on Poisson Geometry (the week after the School) to share some of my memories of him and to give a brief assessment of his impact on the subject. 
Reyer Sjamaar
math.HO math.DG math.SG