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avoid clumsy term "vector field"
{{math-h}}
{{math-h}}
The '''curl''' is a type of [[derivative]] of a [[vector field]] that corresponds to its rate of rotation in three-dimensional space. It is particularly important in electromagnetism and fluid mechanics. The curl of a vector field is another vector field.
The '''curl''' is a type of [[derivative]] of a [[vector]] that corresponds to its rate of rotation in three-dimensional space. It is particularly important in electromagnetism and fluid mechanics. The curl of a vector field is another vector field.
More precisely, it is defined<ref>[http://mathworld.wolfram.com/Curl.html Curl] at Wolfram Mathworld</ref> as the limiting value of rotation per unit area. Written explicitly,
More precisely, it is defined<ref>[http://mathworld.wolfram.com/Curl.html Curl] at Wolfram Mathworld</ref> as the limiting value of rotation per unit area. Written explicitly,