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Math Help - Partial derivation, Kronecker delta

  1. #1
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    Partial derivation, Kronecker delta

    Hi,

    i have attached a problem. Can anyone help me???
    Attached Thumbnails Attached Thumbnails Partial derivation, Kronecker delta-exercise-1.1-5.png  
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  2. #2
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    Re: Partial derivation, Kronecker delta

    Hey FilipVz.

    This looks like a chain rule problem. Just to clarify, are these tensor indices? (Note that a non-zero Jacobian implies that a bi-jection exists between co-ordinate systems if I recall correctly).
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  3. #3
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    Re: Partial derivation, Kronecker delta

    Hi, chiro,

    Yes those are tensor indicies. Do you have any idea how to solve the problem. Thanks in advance.
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  4. #4
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    Re: Partial derivation, Kronecker delta

    Its been a while since I actually did problems with tensors, but try finding the tensor expression for the chain rule in many variables (there has to be a compact form somewhere).
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  5. #5
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    Re: Partial derivation, Kronecker delta

    Quote Originally Posted by FilipVz View Post
    Hi, chiro,

    Yes those are tensor indicies. Do you have any idea how to solve the problem. Thanks in advance.
    have you tried to use the operator eps(123...) by rotating the indices
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