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Design and implementation of the Andromeda proof assistant [Elektronski vir]Bauer, Andrej ...Andromeda is an LCF-style proof assistant where the user builds derivable judgments by writing code in a meta-level programming language AML. The only trusted component of Andromeda is a minimalist ... nucleus (an implementation of the inference rules of an object-level type theory), which controls construction and decomposition of type-theoretic judgments. Since the nucleus does not perform complex tasks like equality checking beyond syntactic equality, this responsibility is delegated to the user, who implements one or more equality checking procedures in the meta-language. The AML interpreter requests witnesses of equality from user code using the mechanism of algebraic operations and handlers. Dynamic checks in the nucleus guarantee that no invalid object-level derivations can be constructed. To demonstrate the flexibility of this system structure, we implemented a nucleus consisting of dependent type theory with equality reflection. Equality reflection provides a very high level of expressiveness, as it allows the user to add new judgmental equalities, but it also destroys desirable meta-theoretic properties of type theory (such as decidability and strong normalization). The power of effects and handlers in AML is demonstrated by a standard library that provides default algorithms for equality checking, computation of normal forms, and implicit argument filling. Users can extend these new algorithms by providing local "hints" or by completely replacing these algorithms for particular developments. We demonstrate the resulting system by showing how to axiomatize and compute with natural numbers, by axiomatizing the untyped ▫$\lambda$▫-calculus, and by implementing a simple automated system for managing a universe of types.Vir: 22nd International Conference on Types for Proofs and Programs [Elektronski vir] : TYPES 2016, May 23-26, 2016, Novi Sad, Serbia (31 str.)Vrsta gradiva - prispevek na konferenciLeto - 2018Jezik - angleškiCOBISS.SI-ID - 18850137
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
Baze podatkov, v katerih je revija indeksirana
Ime baze podatkov | Področje | Leto |
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Povezave do osebnih bibliografij avtorjev | Povezave do podatkov o raziskovalcih v sistemu SICRIS |
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Bauer, Andrej | 15854 |
Gilbert, Gaëtan | ![]() |
Haselwarter, Philipp Georg | 39334 |
Pretnar, Matija, 1982- | 32320 |
Stone, Christopher A. | ![]() |
Vir: Osebne bibliografije
in: SICRIS
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