An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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operator
  آپارگر  
âpârgar
Fr.: opérateur  

Math.: Something that acts on another function to produce another function. In linear algebra an “operator” is a linear operator. In calculus an “operator” may be a differential operator, to perform ordinary differentiation, or an integral operator, to perform ordinary integration.

See also: From → operate; + → -or.