I'm trying to find a simple way to solve a series of equations given by a single equation that uses index variables. See the attached file for the example equation. I can solve them by manually typing out each permutation, but I'm sure there is an easier way. In my most recent attempt I wrote out 80 equations in Mathematica, but I know that I must be doing it the hard way!
Any help would be most appreciated!
Attachment: equation.jpg, URL: ,