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Math Help - Expand Double Summation

  1. #1
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    Expand Double Summation

    Can somebody please show me how to expand this double sum or verify if the following solution is correct?

    This is my attempt but I'm not sure if it's correct:

    (g11*v1*j1)+(g12*v1*j2)+(g13*v1*j3)+(g21*v2*j1)+(g 22*v2*j2)+(g23*v2*j3)+(g31*v3*j1)+(g32*v3*j2)+(g33 *v3*j3)


    Where * indicates standard multiplication.

    Thanks for any help!
    Attached Thumbnails Attached Thumbnails Expand Double Summation-doublesum.jpg  
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  2. #2
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    Re: Expand Double Summation

    Quote Originally Posted by divinelogos View Post
    Can somebody please show me how to expand this double sum or verify if the following solution is correct?

    This is my attempt but I'm not sure if it's correct:

    (g11*v1*j1)+(g12*v1*j2)+(g13*v1*j3)+(g21*v2*j1)+(g 22*v2*j2)+(g23*v2*j3)+(g31*v3*j1)+(g32*v3*j2)+(g33 *v3*j3)
    Where * indicates standard multiplication.
    Here are the first four terms:
    g_{11}v_1w_1+g_{12}v_1w_2+g_{13}v_1w_3+g_{21}v_2w_  1+\cdots
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  3. #3
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    Re: Expand Double Summation

    Quote Originally Posted by Plato View Post
    Here are the first four terms:
    g_{11}v_1w_1+g_{12}v_1w_2+g_{13}v_1w_3+g_{21}v_2w_  1+\cdots
    Ah yes...that looks right. My j's should be w's. Thanks Plato!
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