The '''divergence''' is a way of expressing a certain type of [[derivative]] of a [[vector field]]. It is typically defined for fields of 3-dimensional vectors on 3-dimensional space, but other dimensions are possible. The divergence of a vector field is a [[scalar field]], that is, just a number at each point in space. Vector fields with a divergence of zero are called ''incompressible'' or ''solenoidal''.
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The '''divergence''' is a way of expressing a certain type of [[Derivative (calculus)|derivative]] of a [[vector field]]. It is typically defined for fields of 3-dimensional vectors on 3-dimensional space, but other dimensions are possible. The divergence of a vector field is a [[scalar field]], that is, just a number at each point in space. Vector fields with a divergence of zero are called ''incompressible'' or ''solenoidal''.
Strictly speaking, The divergence of a vector field '''F''' is defined as the limit of the surface integral as the volume shrinks to 0:
Strictly speaking, The divergence of a vector field '''F''' is defined as the limit of the surface integral as the volume shrinks to 0: