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


         2nd column ↑                             ↑mth row


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


A matrix is called diagonal if


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