Matrix

A matrix of m rows and n columns (mxn) is an ordered table of numbers with the form:

     

         2nd column ↑                               ↑ mth row

Example:

If the matrix has the same number of rows and columns, it is called square matrix.

If the matrix has only a row, it is called row vector or row matrix. If it has only a column, it is called column vector or column matrix.

 

One matrix equals another matrix if they have the same dimension and the same terms

A matrix is called triangular if

Examples

A matrix is called diagonal if

Example:

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