# An Etymological Dictionary of Astronomy and AstrophysicsEnglish-French-Persian

## فرهنگ ریشه شناختی اخترشناسی-اخترفیزیک

### M. Heydari-Malayeri    -    Paris Observatory

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Number of Results: 2 Search : divergence
 divergence   واگرایی   vâgerâyi (#)Fr.: divergence   1) The act, fact, or amount of diverging. 2) Math.: A differential → operator that, for a three-dimensional vector function F(x,y,z), is the sum of the → scalar products of the unit vectors and the partial derivatives in each of the three component directions. It is written as div F or ∇ . F = (∂F/∂x)i + (∂F/∂y)j + (∂F/∂z)k, ∇ being the → del operator or → nabla. The divergence of a vector field is a → scalar field. In physics, this operator is used to derive the amount of flux per unit volume leaving an infinitesimal element of volume at a point in a vector field. For example, in an electrostatic field, the divergence of the field is zero unless the volume element contains an electric charge.From diverge, → diverge, + -ence a noun suffix.Vâgerâyi, from vâgerâ stem of vâgerâyidan, → diverge, + noun suffix -i. divergence theorem   فربین ِ واگرایی   farbin-e vâgerâyiFr.: théorème de flux-divergence   Same as → Gauss's theorem.→ divergence; → theorem.