Participation in organization of conferences:

International Conference dedicated to

90th anniversary of L.S. Pontryagin,

Moscow, August 1998 ,

vice chairman of Organizing Committee

Annual conferences

"Geometry and Topology of Manifolds"

Krynica, Poland, 1999-2005.

member of scientific committee

Conference "C*-algebras and elliptic theory"

Banach Center, Bedlewo, Poland, February 23 - 28, 2004,

coorganizer.

International Conference "Topology, Analysis and application to Mathematical Physics"

Moscow, February 14--19, 2005, dedicated to the memory of professor Yu.P. Solovjov (08.10.1944 - 11.09.03),

Deputy chairman of Organizing Committee.