Matrix Inversion Method Essay

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1. INTRODUCTION OF THE MATRIX INVERSION METHODS

1.1 MATRIX :- • A matrix is defined as an ordered rectangular array of numbers.

• A matrix is a system in which m.n elements are arranged in a rectangular formation of m rows and n columns bounded by brackets [].
• This formation is sometimes more explicitly known as m by n matrix, and written as m*n matrix.
• Each of the numbers of this formation is called an element of the matrix.
• A matrix represented by a capital letter such as A, B, etc.
• Example :-

• Each element of the matrix is represented by the same lower-case letter with two suffixes.
• The first denotes the row and the second suffix denotes the column.
• The matrix A is denoted by

1.1.1 What is the Inversion of Matrix …show more content…

1.3.1 Matrix inversion method :-
 There is mainly two types of matrix inversion methods :
1. Direct method  Gauss elimination
2. Iterative method  Gauss sedial
1) Gauss Elimination method :-
 This method is based on the elimination of the unknowns.
 In this methods matrix A of AX=B is reduced to an upper triangular matrix, from which the unknowns are found by the back sutitution method.
2) Gauss sedial method :-
 This is the modified method of Gauss Jacobi method.
 That is, the method of iteration will converge if in each equation of the given system, the absolute value of the largest coefficient is greater than the sum of the absolute values of all the remaining coefficients.

2. HISTROY OF THE MATRIX INVERSION METHODS

 "Matrix" is the Latin word for womb, and it retains that sense in English.
 It can also mean more generally any place in which something is formed or produced.
 The history of matrices goes back to ancient times! But the term "matrix" was not applied to the concept until 1850.
 The origins of mathematical matrices lie with the study of systems of simultaneous linear equations.
 The term "matrix" for such arrangements was introduced in 1850 by James Joseph …show more content…

 "Methods of rectangular arrays," in which a method is given for solving simultaneous equations using a counting board that is mathematically identical to the modern matrix method of solution outlined by Carl Friedrich Gauss (1777-1855), also known as Gaussian elimination.

3. DERIVATION OF THE MATRIX INVERSION METHODS
3.1 Some steps of the matrix inversion methods :- o Say that you know Matrix A and B, and want to find Matrix X:
 XA = B o It would be nice to divide both sides by A (to get X=B/A), but remember we can't divide. o But what if we multiply both sides by A-1 ?
 XAA-1 = BA-1 o And we know that AA-1 = I, so:
 XI = BA-1 o We can remove I (for the same reason we could remove "1" from 1x = ab for numbers):
 X = BA-1 o And we have our answer (assuming we can calculate A-1)
 Matrix the order of multiplication usually changes the answer. Do not assume that AB=BA, it is almost never

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