Abstract
We present an abstract view of existential variables in a dependently typed lambda-calculus based on modal type theory. This allows us to justify optimizations to pattern unification such as linearization, which eliminates many unnecessary occurs-checks. The presented modal framework explains a number of features of the current implementation of higher-order unification in Twelf and provides insight into several optimizations. Experimental results demonstrate significant performance improvement in many example applications of Twelf, including those in the area of proof-carrying code.
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Pientka, B., Pfenning, F. (2003). Optimizing Higher-Order Pattern Unification. In: Baader, F. (eds) Automated Deduction – CADE-19. CADE 2003. Lecture Notes in Computer Science(), vol 2741. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-540-45085-6_40
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DOI: https://doi.org/10.1007/978-3-540-45085-6_40
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