Page 441 - Schaum's Outline of Theory and Problems of Signals and Systems
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Appendix A
Review of Matrix Theory
A.l MATRIX NOTATION AND OPERATIONS
A. Definitions:
1. An m X n matrix A is a rectangular array of elements having m rows and n columns
and is denoted as
When m = n, A is called a square matrix of order n.
2. A 1 x n matrix is called an n-dimensional row vector:
An m x 1 matrix is called an m-dimensional column uector:
3. A zero matrix 0 is a matrix having all its elements zero.
4. A diagonal matrix D is a square matrix in which all elements not on the main diagonal
are zero:
Sometimes the diagonal matrix D in Eq. (A.4) is expressed as
)
D = diag(d, d2 . 4
