Question

Match the following-

• A. $\left(\begin{array}{ccc}1& 0& 0\\ 0& 2& 0\\ 0& 0& 3\end{array}\right]$
• B. $\left(\begin{array}{ccc}3& 0& 0\\ 0& 3& 0\\ 0& 0& 3\end{array}\right]$
• C. $\left(\begin{array}{ccc}1& 2& 3\\ 0& 4& 5\\ 0& 0& 6\end{array}\right]$
• D. $\left(\begin{array}{cc}0& 0\\ 0& 0\end{array}\right]$

Answer 1

Diagonal matrix - A matrix having non-zero elements only in the diagonal running from the upper left to the lower right.
Scalar matrix - A diagonal matrix in which all principal diagonal elements are equal.
Triangular matrix - A square matrix in which all the elements are zero above or below the principal diagonal elements.
Null matrix - All elements are zero.