Альфа — Википедия

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In the system of Greek numerals , it has a value of 1. It was derived from the Phoenician and Hebrew letter aleph - an ox or leader. Letters that arose from alpha include the Latin A and the Cyrillic letter А. In English, the noun 'alpha' is used as a synonym for 'beginning', or 'first' in a series , reflecting its Greek roots. In Ancient Greek , alpha was pronounced \\\\\\\\\\\\\[ a \\\\\\\\\\\\\] and could be either phonemically long \\\\\\\\\\\\\[a: Where there is ambiguity, long and short alpha are sometimes written with a macron and breve today: In Modern Greek , vowel length has been lost, and all instances of alpha simply represent \\\\\\\\\\\\\[a\\\\\\\\\\\\\]. In the polytonic orthography of Greek, alpha, like other vowel letters, can occur with several diacritic marks: In Ionic, the shift took place in all positions. In Doric and Aeolic , long alpha is preserved in all positions. The letter alpha represents various concepts in physics and chemistry , including alpha radiation , angular acceleration , alpha particles , alpha carbon and strength of electromagnetic interaction as Fine-structure constant. Alpha also stands for thermal expansion coefficient of a compound in physical chemistry. It is also commonly used in mathematics in algebraic solutions representing quantities such as angles. Furthermore, in mathematics, the letter alpha is used to denote the area underneath a normal curve in statistics to denote significance level \\\\\\\\\\\\\[4\\\\\\\\\\\\\] when proving null and alternative hypotheses. In zoology, it is used to name the dominant individual in a wolf or dog pack. The uppercase letter alpha is not generally used as a symbol because it tends to be rendered identically to the uppercase Latin A. Alpha was derived from aleph , which in Phoenician means ' ox '. Plutarch , in Moralia , \\\\\\\\\\\\\[6\\\\\\\\\\\\\] presents a discussion on why the letter alpha stands first in the alphabet. Ammonius asks Plutarch what he, being a Boeotian , has to say for Cadmus , the Phoenician who reputedly settled in Thebes and introduced the alphabet to Greece, placing alpha first because it is the Phoenician name for ox —which, unlike Hesiod , \\\\\\\\\\\\\[7\\\\\\\\\\\\\] the Phoenicians considered not the second or third, but the first of all necessities. For Lamprias had said that the first articulate sound made is 'alpha', because it is very plain and simple—the air coming off the mouth does not require any motion of the tongue—and therefore this is the first sound that children make. Alpha, both as a symbol and term, is used to refer to or describe a variety of things, including the first or most significant occurrence of something. The New Testament has God declaring himself to be the ' Alpha and Omega , the beginning and the end, the first and the last. The term 'alpha' has been used to denote position in social hierarchy, examples being ' alpha males ' or pack leaders. For accented Greek characters, see Greek diacritics: From Wikipedia, the free encyclopedia. For other uses, see Alpha disambiguation. Greek grammar for colleges. Analysing the Data Part II: Archived from the original on 22 August Retrieved 14 January Retrieved from ' https: Greek letters Vowel letters. Wikipedia indefinitely semi-protected pages Use dmy dates from June Articles containing Ancient Greek-language text. Views Read View source View history. In other projects Wikimedia Commons. This page was last edited on 29 November , at By using this site, you agree to the Terms of Use and Privacy Policy. Use as scientific symbols.

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