кси
Also known as ξ, Ξ, Greek letter xi, xi (Greek letter), letter xi, xi (letter), Greek letter ksi, ksi (Greek letter)
буква греческого алфавита
AI overview
Xi is a letter from the Greek alphabet that is written as "Ξ" in uppercase and "ξ" in lowercase. It is used in mathematics, science, and engineering to represent various quantities and concepts, and also appears in the names of organizations and fraternities.
AI-generated from the Wikipedia summary — may contain errors.