- A diagonal matrix is an n x n matrix with every off diagonal element equal to zero.
- This is often written showing just the diagonal elements and the upper-right and lower-left corners with a 0
- If we have two matrices such that:
- If each element , then
- The eigenvalues of D are its main diagonal elements, d1, d2, d3, ......dn
- Further reading:
- Matrices: Theory and Applications (Graduate Texts in Mathematics), , Springer-Verlag Berlin and Heidelberg GmbH & Co. KG