Zero MatrixEdit
A **zero matrix** is a matrix with all its entries being zero. An example of a zero matrix is

$M={\begin{bmatrix}0&0&0\\0&0&0\\0&0&0\end{bmatrix}}$

Zero VectorEdit
A **zero vector** also called a **null vector** is a vector with all its entries being zero. An example of a zero vector is

${\vec {v}}=(0,0,0,0)$