Kronecker Delta
Channel: Physics by Alexander FufaeV
Date: 2021-02-04

https://www.youtube.com/watch?v=nUxaL444Uv0&list=PLTjLwQcqQzNKzSAxJxKpmOtAriFS5wWy4

00:00 What is the Kronecker Delta good for?
00:30 Definition and Examples
01:39 Einstein's Summation convention
02:40 Property #1: Kronecker is symmetric
03:16 Property #2: Index contraction
04:56 Property #3: Index transfer
05:42 Property #4: Equal indices summation
06:26 Scalar product with Kronecker delta
More: https://en.fufaev.org/kronecker-delta


Books by Alexander Fufaev:
1) Equations of Physics: Solve EVERY Physics Problem 
https://en.fufaev.org/physics-equations-book
2) Alexander Fufaev and His Never Ending Story: 
https://en.fufaev.org/lifestory