Ultrametric Semantics of Reactive Programs

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• Neel Krishnaswami, Microsoft Research Cambridge
• Friday 25 February 2011, 16:00-17:00
• UG40 Computer Science.

If you have a question about this talk, please contact Paul Levy.

In this talk, I describe a denotational model of higher-order functional reactive programming using ultrametric spaces and nonexpansive maps, which provides a natural Cartesian closed generalization of causal stream functions and guarded recursive defnitions. To write programs, I also show how to define a normalizing type theory corresponding to this semantics.

I show how reactive programs written in this language can be implemented efficiently using an imperatively updated dataflow graph (with correctness proof, but not in this talk!), and demonstrate how GUI (graphical user interface) programs look when written in this style.

This talk is part of the Theoretical computer science seminar series.

This talk is included in these lists:

• Computer Science Departmental Series
• Computer Science Distinguished Seminars
• Theoretical computer science seminar
• UG40 Computer Science
• computer sience

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