1 | Greek indices m,n .. denote Space-Time and run from 0 (time) to 3. |
2 | Latin indices i,j,k .. denote Space and run from 1 to 3 (x y and z). |
3 |
Note indices ALWAYS balance in equations and there is difference between upper and lower indices
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4 | Again M ij M jk = d i k is Expression of Inverse Condition |