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Rhotacism (/ ˈ r oʊ t ə s ɪ z əm / ROH-tə-siz-əm) [1] or rhotacization is a sound change that converts one consonant (usually a voiced alveolar consonant: /z/, /d/, /l/, or /n/) to a rhotic consonant in a certain environment.
The stability radius of a continuous function f (in a functional space F) with respect to an open stability domain D is the distance between f and the set of unstable functions (with respect to D). We say that a function is stable with respect to D if its spectrum is in D. Here, the notion of spectrum is defined on a case-by-case basis, as ...
Age Ain't Nothing but a Number is the debut studio album by American singer Aaliyah.It was released on May 24, 1994, by Blackground Records and Jive Records.After being signed by her uncle Barry Hankerson, Aaliyah was introduced to recording artist and producer R. Kelly.
The molar gas constant (also known as the gas constant, universal gas constant, or ideal gas constant) is denoted by the symbol R or R. It is the molar equivalent to the Boltzmann constant , expressed in units of energy per temperature increment per amount of substance , rather than energy per temperature increment per particle .
The initialism Q.E.D. or QED (Latin: quod erat demonstrandum, "as was to be shown") is often used for the same purpose, either in its upper-case form or in lower case. Bourbaki dangerous bend symbol : Sometimes used in the margin to forewarn readers against serious errors, where they risk falling, or to mark a passage that is tricky on a first ...
Example of etc. typeset with r rotunda in a Fraktur typeface. The abbreviation etc. was typeset using the Tironian et ⁊ , as ⁊c. in early incunables.Later, when typesets no longer contained a sort for the Tironian et, it became common practice to use the r rotunda glyph instead, setting ꝛc. for etc. [1] [failed verification]
Research and development (R&D or R+D), [1] known in some countries as experiment and design, is the set of innovative activities undertaken by corporations or governments in developing new services or products. [2] [3] [4] R&D constitutes the first stage of development of a potential new service or the production process.
R, or r, is the eighteenth letter of the Latin alphabet, used in the modern English alphabet, the alphabets of other western European languages and others worldwide. Its name in English is ar (pronounced / ˈ ɑːr / ), plural ars , [ 1 ] or in Ireland or ( / ˈ ɔːr / ).