Titlebook: Relational Methods in Computer Science; Chris Brink,Wolfram Kahl,Gunther Schmidt Book 1997 Springer-Verlag Wien 1997 algebra.algorithm.alg

健谈

Heterogeneous Relation Algebra,n . a set. It is interpreted as a subset . ⊂ . × . of a Cartesian product of the universe . with itself. If relations . two or more sets are considered, this may easily be subsumed under this view, uniting all the sets in question into one huge set and calling this set the universe .. On the other h

Allowance

难理解

hemoglobin

Relational Semantics of Functional Programs,chapter is a gentle introduction to the idea of regarding functional programs as elements of a relational algebra. Using relations rather than functions we avoid the complexity introduced by artificial bottom elements denoting undefinedness. Relations are also natural candidates for modelling non-de

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细节

Refinement and Demonic Semantics,, which we view as computing an input-output relation on a set of states. We are interested here in programs that are meant to terminate, not in reactive programs. Our programming language is Dijkstra’s language of guarded commands [Dijkstra 1976], which allows the expression of nondeterminism, thus

FLOUR

Tabular Representations in Relational Documents,formal model of tabular expressions, defining the meaning of a large class of tabular forms, is presented. Finally, we discuss the transformation of tabular expressions from one form to another, and illustrate some useful transformations.

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步兵

Logic, Language, and Information,n to the syntax, semantics and pragmatics of natural language. Moreover, it does so from a variety of perspectives. However, one word more than any other gives the flavour of much contemporary work in LLI: .. The purpose of this chapter is twofold. First, we give an impression of what LLI is and why

Manifest