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Divergence
Divergence is a function that maps a vector field F on a scalar field, as
الشرح
Divergence gives the intensity at which a vector field will vary. For a flow it gives the divergence for each point and tells whether somethings flows to that point or flows from that point.
Example 1
The Maxwell equation of the electrical charge density is
where
∇⋅ Divergence D Electrical displacement ρ Electrical charge density