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University of Helsinki

Petri Mäenpää has worked at Nokia Networks in the joint HiBase project with Helsinki University of Technology. The goal of this project is to develop a high-performance database programming environment with challenging additional features required in telecom applications. Mäenpää has been designing and implementing the static type system of Shines, the programming language developed in the HiBase project. His recent work has focused on polymorphic subtype inference, on using the grammatical framework GF for prototyping programming language design featrures, and on the use of dependent types in databases.

Sara Negri and Jan von Plato have finished the book "Structural Proof Theory" (Cambridge University Press, to appear). Aarne Ranta, during a short period of work in Helsinki, implemented as part of the book a proof editor for developing formal derivations in sequent calculus. The system is called PESCA and is implemented in the language Haskell.



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