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Disjoint Semirings for Fractional Permissions

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Fractional permissions are frequently used in concurrent verification to track shared ownership of resources. Most recent uses of fractional permissions assumes only an additive structure for shares (e.g. as separation algebras). We show the benefits of using a multiplicative structure (i.e. a kind of semiring) and discuss the logical and computational consequences of this choice.

This talk is part of the Logic and Semantics Seminar (Computer Laboratory) series.

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