健谈
发表于 2025-3-26 22:45:29
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
发表于 2025-3-27 03:17:13
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难理解
发表于 2025-3-27 05:19:04
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hemoglobin
发表于 2025-3-27 12:38:38
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
Popcorn
发表于 2025-3-27 13:59:02
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细节
发表于 2025-3-27 19:34:41
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 , which allows the expression of nondeterminism, thus
FLOUR
发表于 2025-3-27 21:58:39
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.
brassy
发表于 2025-3-28 04:06:51
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步兵
发表于 2025-3-28 09:33:30
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
发表于 2025-3-28 12:49:52
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