User:Fedt/Sandbox

Foo.

$$ \mathbf{a} \times \mathbf{b} = \begin{vmatrix} \boldsymbol{\hat{\imath}} & \boldsymbol{\hat{\jmath}} & \boldsymbol{\hat{k}} \\ a_1 & a_2 & a_3 \\ b_1 & b_2 & b_3 \end{vmatrix}$$

Bar.