SI&DA - Definition of 'Uniformly Minimum Variance Unbiased Estimator (UMVUE)'

Definition of ‘Uniformly Minimum Variance Unbiased Estimator (UMVUE)’

NOTE: $v$ is a vector, $v\in {\mathbb{R}}^m$ This theorem just says that the matrix $v{v}^T$ is a diagonal matrix, and if we were to sum all the elements in the diagonal the result will be equal to $v^{T}v$. Nothing too surprising.