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Delta ( / ˈdɛltə /; [1] uppercase Δ, lowercase δ; Greek: δέλτα, délta, [ˈðelta]) [2] is the fourth letter of the Greek alphabet. In the system of Greek numerals it has a value of 4. It was derived from the Phoenician letter dalet 𐤃. [3] Letters that come from delta include Latin D and Cyrillic Д .
The symbol ϑ ("script theta") is a cursive form of theta (θ), frequent in handwriting, and used with a specialized meaning as a technical symbol. The symbol ϰ ("kappa symbol") is a cursive form of kappa (κ), used as a technical symbol. The symbol ϖ ("variant pi") is an archaic script form of pi (π), also used as a technical symbol.
The International Radiotelephony Spelling Alphabet or simply Radiotelephony Spelling Alphabet, commonly known as the NATO phonetic alphabet, is the most widely used set of clear-code words for communicating the letters of the Roman alphabet. Technically a radiotelephonic spelling alphabet, it goes by various names, including NATO spelling ...
The character ∂ ( Unicode: U+2202) is a stylized cursive d mainly used as a mathematical symbol, usually to denote a partial derivative such as (read as "the partial derivative of z with respect to x "). [1] [2] It is also used for boundary of a set, the boundary operator in a chain complex, and the conjugate of the Dolbeault operator on ...
In mathematical analysis, the Dirac delta function (or δ distribution ), also known as the unit impulse, [1] is a generalized function on the real numbers, whose value is zero everywhere except at zero, and whose integral over the entire real line is equal to one. [2] [3] [4] Since there is no function having this property, to model the delta ...
Delta Air Lines is a major United States airline based in Atlanta, Georgia. As of December 31, 2021, Delta's mainline aircraft fly to 242 destinations, serving 52 countries across six continents. As of December 31, 2021, Delta's mainline aircraft fly to 242 destinations, serving 52 countries across six continents.
Delta Burke. Delta Burke (born July 30, 1956) [1] is an American actress, producer, and author. From 1986 to 1991, she starred as Suzanne Sugarbaker in the CBS sitcom Designing Women, for which she was nominated for two Emmy Awards for Outstanding Lead Actress in a Comedy Series . Burke's other television credits include Filthy Rich (1982–83 ...
Delta Sigma Theta Sorority, Inc. ( ΔΣΘ) is a historically African American sorority. The organization was founded by college-educated women dedicated to public service with an emphasis on programs that assist the African American community. Delta Sigma Theta was founded on January 13, 1913 by twenty-two women at Howard University in ...
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