Module 15 :  Vector fields, Gradient, Divergence and Curl
Lecture 44 :  Gradient Divergence and Curl [Section 44.1]
 

Thus,

i.e., there is no rotation of the body.

The above example motivates our next definition.

44.1.11 Definition:
  A vector field is said to be irrotational if
44.1.12 Example:
(i)

Let .
  Then
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