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Matrix

A rectangular array of mn elements aij into m rows and n columns, where the elements aij belongs to field F, is said to be a matrix of order m × n (or an m × n matrix) over the field F

Definition of a Matrix: A matrix is a rectangular arrangement or array of numbers or functions, in the form of horizontal and vertical lines and subject to certain rules of operations.

Matrices are usually denoted by capital letters of the alphabet. 

Very often capital letters A, B, C, ... are used to denote a matrix.

If mn numbers or functions are arranged in the form of a rectangular array Z, having m rows and n columns, then Z is called a m × n matrix.

An m × n matrix is represented in the form

Z=(a11a12...a1na21a22...a2n......am1am2...amn), or in the form

Z=[a11a12...a1na21a22...a2n......am1am2...amn]

F is said to be the field of scalars. If, in particular, F be the field of real (complex) numbers, the matrix is said to be a real (complex) matrix. The element aij appearing in the ith row and jth column of the matrix is said to be the ijth element. The matrix is also denoted by the symbol (aij)m,n.

Horizontal lines of a matrix are called rows. Vertical lines of a matrix are called columns.

Each number or function aij is called its element.

The element of a matrix is usually denoted by a small letter of the alphabet along with two suffixes. The first suffix indicated the number of row and the second one indicated the number of column.

The all numbers or functions aij that is the elements of a matrix are enclosed in brackets [   ].

At times, a pair of parenthesis, (  ), are also used to indicate a matrix. For example, the matrix [253447153058] is also expressed as (253447153058)

Matrix

Let us consider the array [452379] of numbers. In this array, there are 3 rows and 2 columns. The element 9 lies in the 3rd row and 2nd column. Similarly, we can fix the position of any other element in the above array. 

● Matrix






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