Defective Ticket Machine Münchner Verkehrsgesellschaft
Defective may refer to:: *Defective matrix, in algebra *Defective verb, in linguistics *Defective, or ''haser'', in Hebrew orthography, a spelling variant that does not include mater lectionis *Something presenting an anomaly, such as a product defect, making it nonfunctional See also * Defect (other) A defect is a physical, functional, or aesthetic attribute of a product or service that exhibits that the product or service failed to meet one of the desired specifications. Defect, defects or defected may also refer to: Examples * Angular defe ...

Defective Matrix
In linear algebra, a defective matrix is a square matrix that does not have a complete basis of eigenvectors, and is therefore not diagonalizable. In particular, an ''n'' × ''n'' matrix is defective if and only if it does not have ''n'' linearly independent eigenvectors. A complete basis is formed by augmenting the eigenvectors with generalized eigenvectors, which are necessary for solving defective systems of ordinary differential equations and other problems. An ''n'' × ''n'' defective matrix always has fewer than ''n'' distinct eigenvalues, since distinct eigenvalues always have linearly independent eigenvectors. In particular, a defective matrix has one or more eigenvalues ''λ'' with algebraic multiplicity ''m'' > 1 (that is, they are multiple roots of the characteristic polynomial), but fewer than ''m'' linearly independent eigenvectors associated with ''λ''. If the algebraic multiplicity of ''λ'' exceeds its geometric multiplicity (that is ...
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Defective Verb
In linguistics, a defective verb is a verb that either lacks a conjugated form or entails incomplete conjugation, and thus cannot be conjugated for certain grammatical tenses, aspects, persons, genders, or moods that the majority of verbs or a "normal" or regular verb in a particular language can be conjugated for. That is to say, a defective verb lacks forms that most verbs in a particular language have. English Common defectives The most commonly recognized defective verbs in English are auxiliary verbs—the class of preterite-present verbs—''can/could'', ''may/might'', ''shall/should'', ''must'', ''ought'', and ''will/would'' (''would'' being a later historical development). Though these verbs were not originally defective, in most varieties of English today, they occur only in a modal auxiliary sense. However, unlike normal auxiliary verbs, they are not regularly conjugated in the infinitive mood. Therefore, these defective auxiliaries do not accept each other as ...
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Mater Lectionis
''Matres lectionis'' (from Latin "mothers of reading", singular form: ''mater lectionis'', from he, אֵם קְרִיאָה ) are consonants that are used to indicate a vowel, primarily in the writing down of Semitic languages such as Arabic, Hebrew and Syriac. The letters that do this in Hebrew are ''aleph'' , '' he'' , ''waw'' and '' yod'' , and in Arabic, the ''matres lectionis'' (though they are much less often referred to thus) are ''ʾalif'' , ''wāw'' and ''yāʾ'' . The yod'' and ''waw'' in particular are more often vowels than they are consonants. The original value of the ''matres lectionis'' corresponds closely to what is called in modern linguistics glides or semivowels. Overview Because the scripts used to write some Semitic languages lack vowel letters, unambiguous reading of a text might be difficult. Therefore, to indicate vowels (mostly long), consonant letters are used. For example, in the Hebrew construct-state form ''bēt'', meaning "the house of" ...
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Product Defect
A product defect is any characteristic of a product which hinders its usability for the purpose for which it was designed and manufactured. Product defects arise most prominently in legal contexts regarding product safety, where the term is applied to "anything that renders the product not reasonably safe".Patricia A. Robinson, ''Writing and Designing Manuals and Warnings'' (2009), p. 234. The field of law that addresses injuries caused by defective products is called ''product liability''. A wide range of circumstances can render a product defective. The product may have a design defect or design flaw, resulting from the product having been poorly designed or tested, so that the design itself yields a product that can not perform its desired function. Even if the design is correct, the product may have a manufacturing defect if it was incorrectly manufactured, for example if the wrong materials are used. A product may also be considered legally defective if it lacks appropriate i ...
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