math.DG math-ph math.MP nlin.SI 37K06, 37K10, 37K25, 37K50, 53B10, 53A20, 53B20, 53B30, 53B50,
  53B99, 53D17, 53D20, 53D22, 37J06, 37J11, 37J35, 70H06
Research problems on relations between Nijenhuis geometry and integrable systems
Alexey V. Bolsinov Andrey Yu. Konyaev Vladimir S. Matveev