Editing Matrix representation (section)

== Basic mathematical operations ==
{{Main|Matrix (mathematics)#Basic operations}}
An m&nbsp;×&nbsp;n (read as m by n) order [[Matrix (mathematics)|matrix]] is a set of numbers arranged in m rows and n columns. Matrices of the same order can be added by adding the corresponding elements. Two matrices can be multiplied, the condition being that the number of columns of the first matrix is equal to the number of rows of the second matrix. Hence, if an m&nbsp;×&nbsp;n matrix is multiplied with an n&nbsp;×&nbsp;r matrix, then the resultant matrix will be of the order m&nbsp;×&nbsp;r.<ref name=ramana>{{cite book|last=Ramana|first=B.V|title=Higher Engineering Mathematics|year=2008|publisher=Tata Mcgraw-Hill|location=New Delhi|isbn=978-0-07-063419-0}}</ref>

Operations like row operations or column operations can be performed on a matrix, using which we can obtain the inverse of a matrix. The inverse may be obtained by determining the adjoint as well.<ref name=ramana /> rows and columns are the different classes of matrices