Hi! I'm having problems with this homework my professor gave us this morning: Prove that Maxwell's equations is invariant under Lorentz Transformation. I'm just currently in third year, and we haven't been taught tensors yet. The extent of what I know mathematically is only until gradient, divergence, curl, and the like. I've been trying to do the "∇.B=0" one but there always is a term that doesn't cancel out. Can anyone show me how to do it? ^I just need an example. Thank you!