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formal system |
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formal systemIn logic, a formal language together with a deductive apparatus by which some well-formed formulas can be derived from others. Each formal system has a formal language composed of primitive symbols that figure in certain rules of formation (statements concerning the expressions allowable in the system) and a set of theorems developed by inference from a set of axioms. In an axiomatic system, the primitive symbols are undefined and all other symbols are defined in terms of them. In Euclidean geometry, for example, such concepts as “point,” “line,” and “lies on” are usually posited as primitive terms. From the primitive symbols, certain formulas are defined as well formed, some of which are listed as axioms; and rules are stated for inferring one formula as a conclusion from one or more other formulas taken as premises. A theorem within such a system is a formula capable of proof through a finite sequence of well-formed formulas, each of which either is an axiom or is validly inferred from earlier formulas. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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Strategies included the introduction of two wound documentation charts; resource allocation for a project officer; provision of wound product resources and formalisation of education sessions. Social historians interested in the increasing preoccupation with manners and social skills from the early sixteenth century have identified Erasmus's De civilitate morum puerilium, translated by Robert Whytynton as A Lytell Booke of Good Maners for Chyldren in 1532, as a turning point in the formalisation of social relations. Within Johannesburg's finely grained grid (originating from the formalisation of nineteenth-century mining camps) the scale of the surroundings is daunting. |
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