LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION

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Linear Transformation:

Linear Transformation:


Definition of linear transformation:

A linear transformation L of the vector space V into the vector space W is a function (denoted by LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ) such that for LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

(a) LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

(b) LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .


Note:

If LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION and L is a linear transformation, L is also called a linear operator on V.


Note:

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION is called the image of LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .


Example:


Let

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

A linear transformation L of LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION (V) into LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION (W) is a function such that

(a) LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION , where

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION and LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

(b) LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION where LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .


Several special cases of the above linear transformation are the following:


  1. Projection: LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION is defined by

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

L is a linear transformation since

(a) for any LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

(b) for LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

Dilation: LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION is defined by

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

Constraction: LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION is defined by

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION Both LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION and LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION are linear transformations.

3.


LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION

Let LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION and LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION . Then, LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .


LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION


LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .


Rotation: LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION is defined by

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

L is a linear transformation.


  1. Let A be fixed LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION matrix. Then,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION defined by

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION

is a linear transformation since

(a) for any LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

(b) for LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .


Example:


Let

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

where LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION is the set of all the polynomials of degrees LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION . Is L a linear transformation?


[solution:]


L is a linear transformation since

(a) for any LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION in LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

(b) for LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION


Example:


Let LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION , L is the operation of taking the derivative, for example,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

Is L a linear transformation?


[solution:]


L is a linear transformation since

(a) for any LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION in LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

(b) for LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION


Example:


LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION is defined by

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .

Is L a linear transformation?


[solution:]


L is not a linear transformation since

(a) for any LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION ,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION


Important result:

Let LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION be a linear transformation. Then,

LINEAR TRANSFORMATION DEFINITION OF LINEAR TRANSFORMATION A LINEAR TRANSFORMATION .


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