Homework Statement
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.
Homework Equations
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...