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A Practical Theory of Programming (Monographs in Computer by Eric C.R. Hehner PDF

By Eric C.R. Hehner

There are numerous theories of programming. the 1st usable concept, referred to as "Hoare's Logic", continues to be essentially the most widely recognized. In it, a specification is a couple of predicates: a precondition and postcondition (these and all technical phrases should be outlined in due course). one other well known and heavily similar thought through Dijkstra makes use of the weakest precondition predicate transformer, that is a functionality from courses and postconditions to preconditions. lones's Vienna improvement technique has been used to virtue in a few industries; in it, a specification is a couple of predicates (as in Hoare's Logic), however the moment predicate is a relation. Temporal common sense is yet one more formalism that introduces a few targeted operators and quantifiers to explain a few features of computation. the idea during this booklet is easier than any of these simply pointed out. In it, a specification is simply a boolean expression. Refinement is simply traditional implication. This thought is additionally extra normal than these simply pointed out, utilizing to either terminating and nonterminating computation, to either sequential and parallel computation, to either stand-alone and interactive computation. And it comprises time bounds, either for set of rules class and for tightly restricted real-time applications.

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