By Eric C.R. Hehner

ISBN-10: 0387941061

ISBN-13: 9780387941066

There are numerous theories of programming. the 1st usable concept, known as "Hoare's Logic", remains to be the most well known. In it, a specification is a couple of predicates: a precondition and postcondition (these and all technical phrases can be outlined in due course). one other well known and heavily comparable idea via Dijkstra makes use of the weakest precondition predicate transformer, that's a functionality from courses and postconditions to preconditions. lones's Vienna improvement process 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 another formalism that introduces a few specified operators and quantifiers to explain a few points of computation. the idea during this e-book is less complicated than any of these simply pointed out. In it, a specification is simply a boolean expression. Refinement is simply usual implication. This idea is usually extra normal than these simply pointed out, employing to either terminating and nonterminating computation, to either sequential and parallel computation, to either stand-alone and interactive computation. And it contains time bounds, either for set of rules type and for tightly restricted real-time applications.

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