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Homework Statement
The Field strength tensor Fuv encodes the electric and magnetic fields via:
Ei=-cF0i, Bi=-1/2 eijkFjk, i=1,2,3 Show that E^2-c^2B^2 and cE.B are invariant under lorentze transformations, by writing them explicitly as invariant contractions using the tensors Fuv and euvab
Homework Equations
The Attempt at a Solution
What does write the explicitly as invariant contractions mean?