Shrikrishna Dani, senior professor, School of Mathematics, Tata Institute of Fundamental Research, Mumbai, has been named the winner of the 2007 TWAS Prize in mathematics for his fundamental contributions to the study of unipotent flows on homogenous spaces of Lie groups. He has also made significant contributions to probability measures on Lie groups. Dani is also well known for his work on the behaviour of orbits on homogenous space concerning, for example, closure, distribution, recurrence, boundedness and divergence, and for relating these factors to questions in Diophantine approximation. His results on uniform recurrence of trajectories of unipotent flows played an important role in Ratners proof of Raghunathan conjecture. With G.A. Margulis, Dani has made notable improvements to Ratners uniform distribution theorum and deduced a quantitative version of the Oppenheim conjecture.
Sergio Danilo Junho Pena, professor, Departamento de Bioquimica e Imunologia, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil, has won he 2007 TWAS Prize in the medical sciences for his significant contributions to human and parasite molecular genetics. He has received international recognition for his investigations into clinical, microbiological and population genetics. He has also used Y-chromosome and mitochondrial DNA analysis to trace the genetic ancestry of Brazils diverse population. In addition, Slzano has applied his knowledge in very practical ways, for example, to develop techniques for paternity investigations. He created and currently directs the Danilo Pena Foundation providing grants to highly intelligent, poor children to attend high school and college.
Jie Zhang, president, Shanghai Jiao Tong University, has won the 2007 TWAS Prize in Physics for his significant contri
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Abdus Salam International Centre for Theoretical Physics