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Homework Help: Indicial/Einstein Notation proofs

  1. Aug 26, 2010 #1
    Hello, does anyone know where I can find a proof of the following identity?

    εijk εkmn = δim δjn − δin δjm
     
  2. jcsd
  3. Aug 26, 2010 #2
  4. Aug 26, 2010 #3

    lanedance

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    Homework Helper

    there's not too many cases to consider, when you realise if if k= any of (i,j,m,n) or i=j or m=n, the result is zero
     
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