Basic terminology and definitions
2.6
An m?n matrix is a rectangular array of numbers with m rows and
n columns.
If m = n, then the matrix is said to be a square.
2 3 4
3 4 5
4 5 6
5 6 7
m=4, n=3
A=[aij]
a11 a12 a13
a21 a22 a23
a31 a32 a33
a41 a42 a43
Aij=i+j
(2,3)th element: 5
2nd row: [3 4 5]
2nd column: 3
4
5
6
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