1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Integral identity

  1. May 28, 2010 #1
    1. By considering each component of the vector A show that [tex]\iint A(u.n)ds = \iiint{(u.nambla)A+A(nambla.u)}dV[/tex] (A,u and n are vectors)

    2. Relevant equations

    3. Let A = ai + bj + ck. L.H.S: [tex] \iint ai (u.n)ds + \iint bj (u.n)ds +\iint ck (u.n)ds[/tex]
    R.H.S. = [tex] \iiint(u.nambla)ai dV+ \iiint(u.nambla)bj dV+ \iiint(u.nambla)ck dV + \iiinta(nambla.u)i dV ... [/tex]

    Sorry my latex is all over the place maybe just ignore this
  2. jcsd
  3. May 28, 2010 #2
    That gradient symbol is called "nabla." "nambla" is something else entirely.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook