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Equality, Quasi-Implicit Products, and Large Eliminations
Journal article   Open access

Equality, Quasi-Implicit Products, and Large Eliminations

Vilhelm Sjoberg and Aaron Stump
Electronic proceedings in theoretical computer science, Vol.45(45), pp.90-100
01/23/2011
DOI: 10.4204/EPTCS.45.7
url
https://doi.org/10.4204/EPTCS.45.7View
Published (Version of record) Open Access

Abstract

This paper presents a type theory with a form of equality reflection: provable equalities can be used to coerce the type of a term. Coercions and other annotations, including implicit arguments, are dropped during reduction of terms. We develop the metatheory for an undecidable version of the system with unannotated terms. We then devise a decidable system with annotated terms, justified in terms of the unannotated system. Finally, we show how the approach can be extended to account for large eliminations, using what we call quasi-implicit products.
Computer Science Computer Science, Theory & Methods Science & Technology Technology

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