(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

I am a bit confused with how to deal with Kronecker Delta.

I need to show that P,i = ( P*δij ),j

The i and j are subscripts.

2. Relevant equations

3. The attempt at a solution

P,i = ( P*δij ),j = P,j*δij + P*δij,j

I assumed I could get rid of P*δij,j leaving me with P,j*δij.

After this I am stuck. I'm not sure if I am supposed to consider Kronecker Delta as the Identity Matrix now or not. If I do, I end up with P,j which technically would equal P,i.

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# Understanding Kronecker Delta

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