I'm supposed to verify that this fourth-rank tensor is isotropic assuming cartesian coordinates: [A]_{}[/ijkl]=[δ]_{}[/kl][δ_{}[/kl](adsbygoogle = window.adsbygoogle || []).push({});

from what I gathered being isotropic means that it stays the same no matter what the rotation is

I have no clue how to even start this problem or what I am looking at.

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# Homework Help: Verifying that a tensor is isotropic

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