Variational/indicial notation question

  1. Dear All,

    Not sure I'm posting in the correct subforum here, but I'm wondering if anyone can help me understand how to expand the following:

    δui,jim+ui,m)

    I can't quite get to grips with the indicial notation in the example, the δui,j is the variation of u (displacement in this example) and the δim is the kronecker delta.. I just want to expand the brackets, can anyone offer any advice on how to do this.

    Many thanks
     
  2. jcsd
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