Matrices – Notes

Fundamental of Matrices

A matrix is an ordered rectangular array of numbers or functions. The numbers or functions are called the elements or the entries of the matrix.

Column matrix: A matrix is said to be column matrix if it has only one column.

Row matrix A matrix is said to be a row matrix if it has only one row.

Square matrix: A matrix, in which the number of rows is equal to the number of columns, is said to be a square matrix.

Diagonal matrix: A square matrix is said to be a diagonal matrix if all its non diagonal elements are zero.

Scalar matrix: A diagonal matrix is said to be a scalar matrix if its diagonal elements are equal.