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Notation

\(\pmb{x}\) a vector

\(\pmb{X}\) a matrix

\(\pmb{x}^T\) the transpose of a vector \(\pmb{x}\)

\(\pmb{X}^T\) the transpose of a matrix \(\pmb{X}\)

\(\omega\) a parameter

\(\widehat{\omega}\) an estimator of a parameter \(\omega\)

Notation