Outer Product

#Math
See Dyadic products explanation at the bottom of Continuum Mechanics

$$\displaystyle \mathbf{a\otimes b}=\mathbf{ab}^{^{\top}}=

\begin{bmatrix}
a_{1}b_{1} & \ldots & a_{1}b_{m} \\\vdots & \ddots & \vdots \\a_{n}b_{1} & \ldots & a_{n}b_{m}
\end{bmatrix}
$$

$\displaystyle c_{ij}=a_{i}b_{j}$