Identify all linear transformations from C2 to C3

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Homework Help Overview

The discussion revolves around identifying linear transformations from C2 to C3, with participants exploring the properties that define linear transformations, particularly in the context of complex variables.

Discussion Character

  • Exploratory, Conceptual clarification, Assumption checking

Approaches and Questions Raised

  • Participants discuss the criteria for linear transformations, specifically checking the condition T(ax + by) = T(ax) + T(by). There is an exploration of specific examples, including a polynomial and a matrix representation of a transformation. Questions arise regarding the treatment of complex variables and specific entries in matrices.

Discussion Status

Some participants have confirmed the validity of arguments regarding the linearity of certain transformations, while others are seeking clarification on the application of the linearity condition to complex variables. Multiple interpretations of the transformations are being explored, particularly in relation to specific cases presented in the problem.

Contextual Notes

Participants are navigating the complexities of linear transformations in the context of complex numbers, with specific attention to the implications of matrix entries and the properties of the transformations being discussed.

jinksys
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Homework Statement



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Homework Equations





The Attempt at a Solution



In the previous problem I was asked to identify if a polynomial, such as f(x)=2x was a linear transformation. In that case I checked to see if f(ax + by) = f(ax) + f(by). I figure I would be doing something similar in this case.

I would check to see if T(ax + by) = T(ax) + T(by).

So for problem (A) would I do something like:

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and since T(ax + by) ≠ T(ax) + T(by), T1 is not a linear transformation?
 
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You are correct, T1 is not a linear transformation, and your argument is correct/valid.
 
Thanks!
 
I have a question about part (D), which is

[tex] <br /> Tx =<br /> \left[ {\begin{array}{cc}<br /> 1 & 0 \\<br /> 2-i & 3i \\<br /> i-i & 4\\<br /> \end{array} } \right]x[/tex]

I assume I use the same procedure? Is anything special I need to do in regards to the complex variables?

I find that it IS a linear transformation, is that correct? Also, isn't i-i just 0?
 

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