**He
received his Ph.D. degree from Moscow Institute for Physics
and Technology in 1980 and his Dr.Sc. degree from Steklov
Institute of Mathematics in 1990. He was with Department of
Mathematics of Moscow Institute for Physics and Technology
during 1980-1984, since 1984 he has been with Steklov
Institute of Mathematics of Russian Academy of
Sciences where he was a Principal
Researcher at the Department of Differential Equations founded
by L.S.Pontryagin. He is a Full Professor at the
Department of Mathematics , Western Michigan University
since 2000.**

**He
authored about 50 papers in above mentioned areas. He is
a coauthor with F.H.Clarke, R.J.Stern and P.R.Wolenski
of the textbook "
Nonsmooth Analysis and Control Theory" published
by Springer- Verlag in 1998.**

He is a member of the Editorial Boards of "Journal
of Dynamical and Control Systems"**and
"**Mathematics of Control, Signals, and Systems**". **