Identity or Unit Matrix – Definition and Examples

Here you will learn what is the identity or unit matrix definition with examples. Let’s begin – Identity or Unit Matrix Definition : A square matrix A = $$[a_{ij}]_{n\times n}$$ is called a identity or unit matrix if (i) $$a_{ij}$$ = 0 for all i $$\ne$$ j and, (ii) $$a_{ii}$$ = 1, for all i …