Proof #528: "The third standardized moment equals the skewness" (momstand-3rd) #NewProof
https://statproofbook.github.io/P/momstand-3rd

Proof #527: "The second standardized moment equals one" (momstand-2nd) #NewProof
https://statproofbook.github.io/P/momstand-2nd

Proof #526: "The first standardized moment equals zero" (momstand-1st) #NewProof
https://statproofbook.github.io/P/momstand-1st

Proof #525: "Marginal distributions of the multivariate t-distribution" (mvt-marg) #NewProof
https://statproofbook.github.io/P/mvt-marg

Proof #524: "Second-order expectations for the matrix-normal distribution" (matn-meanso) #NewProof
https://statproofbook.github.io/P/matn-meanso

Proof #524: "Second-order expectations for the matrix-normal distribution" (matn-meanso) #NewProof
https://statproofbook.github.io/P/matn-meanso

Proof #523: "Expectation of quadratic forms for the matrix-normal distribution" (matn-meanqf) #NewProof
https://statproofbook.github.io/P/matn-meanqf

Proof #522: "Cross-covariance matrices of the matrix-normal distribution" (matn-ccm) #NewProof
https://statproofbook.github.io/P/matn-ccm

Proof #521: "Chi-squared distribution is a special case of gamma distribution" (chi2-gam2) #NewProof
https://statproofbook.github.io/P/chi2-gam2

Proof #520: "Mode of the beta distribution" (beta-mode) #NewProof
https://statproofbook.github.io/P/beta-mode