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  2. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    t. e. Greek letters are used in mathematics, science, engineering, and other areas where mathematical notation is used as symbols for constants, special functions, and also conventionally for variables representing certain quantities. In these contexts, the capital letters and the small letters represent distinct and unrelated entities.

  3. Greek alphabet - Wikipedia

    en.wikipedia.org/wiki/Greek_alphabet

    This happened during the 2005 season (when Alpha through Zeta were used), and the 2020 season (when Alpha through Iota were used), after which the practice was discontinued. [ 80 ] [ 81 ] In May 2021 the World Health Organization announced that the variants of SARS-CoV-2 of the virus would be named using letters of the Greek alphabet to avoid ...

  4. General Motors Zeta platform - Wikipedia

    en.wikipedia.org/wiki/General_Motors_Zeta_platform

    Zeta was the original name for General Motors ' full-size rear-wheel drive automobile platform developed by GM's Australian subsidiary company Holden and was at one stage referred to as the "GM Global RWD Architecture". The GM Zeta platform replaced the V-body, and debuted with 2006 Holden Commodore (VE) sedan and Holden (VE) Ute.

  5. General Motors Sigma platform - Wikipedia

    en.wikipedia.org/wiki/General_Motors_Sigma_platform

    GM Alpha platform. The General Motors Sigma platform is a mid-size automobile platform used by General Motors from the 2003 to 2015 model years. Exclusive to the Cadillac division, Sigma was the successor to the Opel-designed V platform. Initially developed for executive cars, the architecture was expanded for larger model lines, sports sedans ...

  6. Sigma - Wikipedia

    en.wikipedia.org/wiki/Sigma

    Sigma (/ ˈsɪɡmə / SIG-mə; [1] uppercase Σ, lowercase σ, lowercase in word-final position ς; Greek: σίγμα) is the eighteenth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 200. In general mathematics, uppercase Σ is used as an operator for summation.

  7. Riemann zeta function - Wikipedia

    en.wikipedia.org/wiki/Riemann_zeta_function

    The Riemann zeta function ζ(s) is a function of a complex variable s = σ + it, where σ and t are real numbers. (The notation s, σ, and t is used traditionally in the study of the zeta function, following Riemann.) When Re (s) = σ > 1, the function can be written as a converging summation or as an integral: where. is the gamma function.

  8. Zeta - Wikipedia

    en.wikipedia.org/wiki/Zeta

    Zeta (UK: / ˈziːtə /, US: / ˈzeɪtə /; [1] uppercase Ζ, lowercase ζ; Ancient Greek: ζῆτα, Demotic Greek: ζήτα, classical [d͡zɛ̌ːta] or [zdɛ̌ːta] zē̂ta; Greek pronunciation: [ˈzita] zíta) is the sixth letter of the Greek alphabet. In the system of Greek numerals, it has a value of 7. It was derived from the Phoenician ...

  9. Alpha and beta male - Wikipedia

    en.wikipedia.org/wiki/Alpha_and_beta_male

    Sigma male is an internet slang term to describe masculine men. The term gained prominence within Internet culture during the late 2010s and early 2020s, and has inspired numerous memes, graffitis and videos. [32] It is used to denote a male who is equally dominant to an alpha male but