# Problem 20. Kronecker delta & Levi-Civita Symbol

## The problem asks you to prove

1. Some properties of Kronecker delta and Levi-Civita Symbol

## You should know about

1. Definition of Kronecker delta symbol (Equation 1.14)
2. Definition of Levi-Civita symbol (Equation 1.67)

## References

https://en.wikipedia.org/wiki/Kronecker_delta

https://en.wikipedia.org/wiki/Levi-Civita_symbol