On 0-Complete Partial Metric Spaces and Quantitative Fixed Point Techniques in Denotational Semantics

In 1994, Matthews introduced the notion of partial metric space with the aim of providing a quantitative mathematical model suitable for program verification. Concretely, Matthews proved a partial metric version of the celebrated Banach fixed point theorem which has become an appropriate quantitativ...

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Bibliographic Details
Published in:Abstract and Applied Analysis Vol. 2013; no. 2013; pp. 692 - 702-1368
Main Authors: Shahzad, Naseer, Valero, O.
Format: Journal Article
Language:English
Published: Cairo, Egypt Hindawi Limiteds 01.01.2013
Hindawi Puplishing Corporation
Hindawi Publishing Corporation
John Wiley & Sons, Inc
Wiley
Subjects:
Computer science
Denotational semantics
Fixed point theory
Mathematical models
Mathematical research
Metric spaces
Programming languages
Recursive algorithms
Semantics
ISSN:1085-3375, 1687-0409
Online Access:Get full text
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Summary:In 1994, Matthews introduced the notion of partial metric space with the aim of providing a quantitative mathematical model suitable for program verification. Concretely, Matthews proved a partial metric version of the celebrated Banach fixed point theorem which has become an appropriate quantitative fixed point technique to capture the meaning of recursive denotational specifications in programming languages. In this paper we show that a few assumptions in statement of Matthews fixed point theorem can be relaxed in order to provide a quantitative fixed point technique useful to analyze the meaning of the aforementioned recursive denotational specifications in programming languages. In particular, we prove a new fixed point theorem for self-mappings between partial metric spaces in which the completeness has been replaced by 0-completeness and the contractive condition has been weakened in such a way that the new one best fits the requirements of practical problems in denotational semantics. Moreover, we provide examples that show that the hypothesis in the statement of our new result cannot be weakened. Finally, we show the potential applicability of the developed theory by means of analyzing a few concrete recursive denotational specifications, some of them admitting a unique meaning and others supporting multiple ones.
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ISSN:1085-3375
1687-0409
DOI:10.1155/2013/985095