- #1
yukcream
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Given U^k_i, the components of U is a delta function i.e for i=k U^i_k =1,
to prove it is invariant under Lorentz transformation~~
I don't know how to express it in Einstein summation notation, I am very confused with the upper-lower index, is it right to write the transformation in this?
U'^k_i = T^i_m T^n_k U^k_i ? where T is the Lorentz transformation~~
yukyuk
to prove it is invariant under Lorentz transformation~~
I don't know how to express it in Einstein summation notation, I am very confused with the upper-lower index, is it right to write the transformation in this?
U'^k_i = T^i_m T^n_k U^k_i ? where T is the Lorentz transformation~~
yukyuk