Recent content by Citizen_Insane

Thanks guys, that makes perfect sense now. I had forgotten that they could have been in Einstein notation.

Homework Statement I'm having some trouble understanding the Kronecker Delta function and how it is used. I understand the basics of it, if i=j, delta=1, if not, delta=0. However, I don't understand why: \delta_{ii}=3 and \delta_{ij}\delta_{ij}=3Homework Equations \delta_{ij}=...