Alternative Equation Formats

$$\begin{array}{rl}\mathrm{E}\left[\begin{array}{c}\mathit{\gamma <!--\; \gamma \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\\ \mathit{ϵ<!--\; ϵ\; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\end{array}\right]& =\left[\begin{array}{c}\mathbf{0}\\ \mathbf{0}\end{array}\right]\\ \mathrm{V}\mathrm{a}\mathrm{r}\left[\begin{array}{c}\mathit{\gamma <!--\; \gamma \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\\ \mathit{ϵ<!--\; ϵ\; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\end{array}\right]& =\left[\begin{array}{cc}\mathbf{G}& \mathbf{0}\\ \mathbf{0}& \mathbf{R}\end{array}\right]\end{array}$$

$$\begin{array}{rl}\mathrm{E}\left[\begin{array}{c}\mathit{\gamma <!--\; \gamma \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\\ \mathit{ϵ<!--\; ϵ\; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\end{array}\right]& =\left[\begin{array}{c}\mathbf{0}\\ \mathbf{0}\end{array}\right]\\ \mathrm{V}\mathrm{a}\mathrm{r}\left[\begin{array}{c}\mathit{\gamma <!--\; \gamma \; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\\ \mathit{ϵ<!--\; ϵ\; --><span\; class="Comment\_comment\_\_N0+Yl"></span>}\end{array}\right]& =\left[\begin{array}{cc}\mathbf{G}& \mathbf{0}\\ \mathbf{0}& \mathbf{R}\end{array}\right]\end{array}$$

\begin{align*} \mr{E}\left[ \begin{array}{c} \bgamma \\ \bepsilon \end{array} \right] & = \left[\begin{array}{c} \Strong{0} \\ \Strong{0} \end{array} \right] \\ \mr{Var}\left[ \begin{array}{c} \bgamma \\ \bepsilon \end{array} \right] & = \left[\begin{array}{cc} \mb{G} & \Strong{0} \\ \Strong{0} & \mb{R} \end{array} \right] \end{align*}