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The letter Sigma. Sigma (/ ˈ s ɪ ɡ m ə / SIG-mə; [1] uppercase Σ, lowercase σ, lowercase in word-final position ς; Ancient 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.
The letter sigma, in standard orthography, has two variants: ς, used only at the ends of words, and σ, used elsewhere. The form ϲ (" lunate sigma ", resembling a Latin c ) is a medieval stylistic variant that can be used in both environments without the final/non-final distinction.
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.
Some know “sigma” as the 18th letter of the Greek alphabet but it’s also teen slang for a cool dude. ... Another definition for “sigma” says Lindsay, is “the best.” ... One example ...
As reported by British GQ, the word “sigma” was born from the misogynistic “manosphere.” What does ‘sigma’ mean? Philip Lindsay , a special education math teacher in Payson, Arizona ...
List of letters used in mathematics, science, and engineering; List of mathematical abbreviations; List of typographical symbols and punctuation marks; ISO 31-11 (Mathematical signs and symbols for use in physical sciences and technology) List of APL functions
Root Meaning in English Origin language Etymology (root origin) English examples sacc-[1]bag: Greek: σάκκος (sákkos): sack sacchar-[2]sugar: Greek: σάκχαρ, σάκχαρον (sákkharon)
The end of a sentence. ¶ Pilcrow: Paragraph mark, paragraph sign, paraph, alinea, or blind P: Section sign ('Silcrow') ⌑ Pillow (non-Unicode name) 'Pillow' is an informal nick-name for the 'Square lozenge' in the travel industry. The generic currency sign is superficially similar | Pipe (non-Unicode name) (Unicode name is "vertical bar ...