An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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Kronecker delta
  دلتای ِ کرونکر  
deltâ-ye Kronecker (#)
Fr.: delta de Kronecker  

The function δik of two variables i and j defined by δik = 1 if i = j, and δik = 0 if i ≠ j.

See also: Leopold Kronecker (1823-1891), a German mathematician; delta, Gk. letter of alphabet.