Sanjay RAJOPADHYE, professeur des universités à Colorado State University (USA)

Sanjay Rajopadhye has a long history of collaboration with Patrice Quinton, director of ENS Cachan - Bretagne, as with several research groups at IRISA which he visited for the first time in 1989. At this period, he was implicated in the development of some of the early results on the then emerging foundations of the polyhedral model, a formal model for the expression of parallel regular computations.

In 1993 he joined IRISA where he was initially a guest researcher, then an associated professor and finally a CNRS research fellow until 2001 when he decided to return to the USA.

His time in Rennes was spent collaborating with researchers on the INRIA - CNRS project API (Architectures Parallèles Intégrées). Included on the team was Patrice Quinton and Dominique Lavenier among others. He also supervised Steven Derrien's PhD thesis and ultimately led the INRIA - CNRS project COSI.  

In addition to a number of theoretical advances, the work of API/COSI witnessed the development of a number of important software research tools, notably POLYLIB, MMAlpha and LoopGen.

Since Sanjay Rajopadhye's appointment as full professor at the Colorado State University he has pursued this research and worked on the extension of the polyhedral model and the development of new software tools for program transformations, for example AlphaZ.

The foundations which were laid during his time in France have led to the fact that Sanjay Rajopadhye is still today, nearly 20 years later, a very active member of many successful research projects currently in progress in Rennes. During his recent visit he worked on extending the program transformations of AlphaZ.

In collaboration with Patrice Quinton and Steven Derrien his work entailed the exploration of the use of AlphaZ to write code generators for FPGA (Field Programmable Gate Arrays : Electrically reconfi gurable integrated circuits) accelerators.

Finally with Dominique Lavenier and Rumen Andonov he explored new algorithmic techniques for applications in computational biology as well as optimization strategies for program autotuning.

During this visit Sanjay Rajopadhye also gave lectures and held a seminar for the students in the Computer Science Department at the ENS Cachan - Bretagne.