A big first step
نویسندگان
چکیده
منابع مشابه
Big-Step Semantics
With the popularity of model-driven methodologies, and the abundance of modelling languages, a major question for a requirements engineer is: which language is suitable for modelling a system under study? We address this question from a semantic point-of-view for big-step modelling languages (BSMLs). BSMLs are a popular class of behavioural modelling languages in which a model can respond to an...
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When doing an interactive proof about a piece of software, it is important that the underlying programming language’s semantics does not make the proof unnecessarily difficult or unwieldy. Both smallstep and big-step semantics are commonly used, and the latter is typically given by an inductively defined relation. In this paper, we consider an alternative: using a recursive function akin to an ...
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In spite of the popularity of small-step semantics, big-step semantics remain used by many researchers. However, big-step semantics suffer from a serious duplication problem, which appears as soon as the semantics account for exceptions and/or divergence. In particular, many premises need to be copy-pasted across several evaluation rules. This duplication problem, which is particularly visible ...
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Traditionally, decidability of conversion for typed λ-calculi is established by showing that small-step reduction is confluent and strongly normalising. Here we investigate an alternative approach employing a recursively defined normalisation function which we show to be terminating and which reflects and preserves conversion. We apply our approach to the simply-typed λ-calculus with explicit s...
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A new approach to the design of the computing curriculum for a Bachelor of Arts degree is described. The approach relies extensively on problem-based instruction and computer graphics. The novelty arises from the magnitude and origin of the problems to be integrated into the curriculum and the breadth of the impact across the curriculum. Results from a trial course, the first experiment with th...
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ژورنال
عنوان ژورنال: Human Reproduction
سال: 2004
ISSN: 1460-2350,0268-1161
DOI: 10.1093/humrep/deh564