An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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closure axiom
  بنداشت ِ بندش  
bondâšt-e bandeš
Fr.: axiome de clôture  

A basic rule in → group theory stating that if a and b are a group element then a * b is also a group element.

See also: → closure; → axiom.