Possible typo and notation ambiguity

[plafle]

On Page 237 there may be a typo

"die" may actually be "dice"

On Page 241

use notation var(X) to represent both the variance of X and the covariance matrix of X. Consider denote the covariance matrix of X as cov(X)?

[MathFoundationRL]

Thanks for the careful reading and suggestion. The first I think is a typo. Thanks for the second suggestion.

[plafle]

Thank you for your magnificent work!