Person:
Hidalgo Herrero, Mercedes

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First Name
Mercedes
Last Name
Hidalgo Herrero
URI
https://hdl.handle.net/20.500.14352/76816
Affiliation
Universidad Complutense de Madrid
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Educación-Centro Formación Profesor
Department
Didáctica de Ciencias Experimentales, Sociales y Matemáticas
Area
Didáctica de la Matemática
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Author: Ortega Mallén, Yolanda × Subject: 510.64 ×

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    Relating function spaces to resourced function spaces.
    (Proceeding SAC '11 Proceedings of the 2011 ACM Symposium on Applied Computing, 2001) Sánchez Gil, Lidia; Hidalgo Herrero, Mercedes; Ortega Mallén, Yolanda
    In order to prove the computational adequacy of the (operational)natural semantics for lazy evaluation with respect to a standard denotational semantics, Launchbury defines a resourced denotational semantics. This should be equivalent to the standard one when given infinite resources, but this fact cannot be so directly established, because each semantics produces values in a different domain. The values obtained by the standard semantics belong to the usual lifted function space D = [D → D]⊥, while those produced by the resourced semantics belong to [C → E] where E satisfies the equation E = [[C → E] → [C → E]]⊥ and C (the domain of resources) is a countable chain domain defined as the least solution of the domain equation C = C⊥. We propose a way to relate functional values in the standard lifted function space to functional values in the corresponding resourced function space. We first construct the initial solution for the domain equation E = [[C → E] → [C → E]]⊥ following Abramsky’s construction of the initial solution of D = [D → D]⊥. Then we define a “similarity” relation between values in the constructed domain and values in the standard lifted function space. This relation is inspired by Abramsky’s applicative bisimulation. Finally we prove the desired equivalence between the standard denotational semantics and the resourced semantics for the lazy λ-calculus.