Answer
... multiplicative inverse ...
Work Step by Step
Let A bean n\times n square matrix.
If there is a square matrix $A^{-1}$ such that
$AA^{-1}=I_{n}$ and $A^{-1}A=I_{n},$
then $A^{-1}$ is the multiplicative inverse of $A$.
Here, B is such a matrix.
$B$ is called the multiplicative inverse of $A$