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Vector field question

  1. May 8, 2007 #1
    1. The problem statement, all variables and given/known data

    A vector field V is not irrotational.Show that it is always possible to find f such that fV is irrotational.

    2. Relevant equations

    3. The attempt at a solution

    \nablax[fV]=f\nablaxV-Vx\nablaf
    I have to equate the LHS to zero.But then,how can I extract f out of the resulting equation?
    Please help
     
  2. jcsd
  3. May 8, 2007 #2
    I don't know why that \nabla didn't work.Please bear with this problem and help me.
     
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