Dr. Vivek S. Borkar ranks among the top practioners of control theory world wide. His contribution to the theory of stochastic control is profound and broad, and some of his results on adaptive control are the most general available today.nnDr. Borkar is professor in the Department of Theoretical Computer Science at the Tata Institute of Fundamental Research, Mumbai since 1999 and was earlier with the Indian Institute of Science, Bangalore. He has held visiting faculty positions at prestigious institutions such as Technische Hogeschool Twente, M.I.T., USA, University of Maryland, Scoula Normale Superiore, Pisa, and University of Califor nia, Berkeley.n