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In computer science, program derivation is the derivation of a program from its specification, by mathematical means. To derive a program means to write a formal specification, which is usually non-executable, and then apply mathematically correct rules in order to obtain an executable program satisfying that specification. The program thus ...
A derivation of a string for a grammar is a sequence of grammar rule applications that transform the start symbol into the string. A derivation proves that the string belongs to the grammar's language. A derivation is fully determined by giving, for each step: the rule applied in that step; the occurrence of its left-hand side to which it is ...
For example, the derivation of the word uncommon from common + un-(a derivational morpheme) does not change its part of speech (both are adjectives). An important distinction between derivational and inflectional morphology lies in the content/function of a listeme [clarification needed]. Derivational morphology changes both the meaning and the ...
Inflection of the Scottish Gaelic lexeme for 'dog', which is cù for singular, chù for dual with the number dà ('two'), and coin for plural. In linguistic morphology, inflection (less commonly, inflexion) is a process of word formation [1] in which a word is modified to express different grammatical categories such as tense, case, voice, aspect, person, number, gender, mood, animacy, and ...
For example, in the English language, run, runs, ran and running are forms of the same lexeme, which can be represented as RUN. [note 1] One form, the lemma (or citation form), is chosen by convention as the canonical form of a lexeme. The lemma is the form used in dictionaries as an entry's headword. Other forms of a lexeme are often listed ...
There are many examples for which linguists fail to agree whether a given rule is inflection or word formation. The next section will attempt to clarify the distinction. Word formation includes a process in which one combines two complete words, but inflection allows the combination of a suffix with a verb to change the latter's form to that of ...
The United States Food and Drugs Administration is warning pet owners about a common medication given to pets to treat arthritis. The F.D.A. now says that the drug Librela may be associated with ...
A rising point of inflection is a point where the derivative is positive on both sides of the point; in other words, it is an inflection point near which the function is increasing. For a smooth curve given by parametric equations , a point is an inflection point if its signed curvature changes from plus to minus or from minus to plus, i.e ...