An Etymological Dictionary of Astronomy and Astrophysics

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فرهنگ ریشه‌شناختی اخترشناسی-اخترفیزیک

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exact differential
  دگرسانه‌ی ِ رزین  
degarsâne-ye razin
Fr.: différentielle exacte  

If N(x,y) is a → function of two → independent variables, then dN = (∂N/∂x)dx + (∂N/∂y)dy is the exact differential.

See also: → exact; → differential.