Linear Transformation Homework: [T]BC, [v]B, and T(v) Explained

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SUMMARY

The discussion focuses on the linear transformation T: R3 --> R2 defined by T(x,y,z) = (z-x, 2y-x) and its implications for the vectors v = (2, -1, -3), basis B = {(0,0,1),(0,1,1),(1,1,1)}, and basis C = {(1,-1), (2,1)}. The user successfully computed the matrix representation [T]_{BC} by applying T to the basis vectors in B and expressing the results in terms of the basis vectors in C. The first column of [T]_{BC} was determined to be (1/3, 1), and the user is encouraged to complete the calculations for the remaining basis vectors. Additionally, the representation [v]_{B} and the transformation T(v) are also discussed.

PREREQUISITES
  • Understanding of linear transformations and their matrix representations
  • Familiarity with basis vectors and coordinate transformations
  • Knowledge of vector spaces, specifically R3 and R2
  • Ability to perform operations with vectors and matrices
NEXT STEPS
  • Calculate the remaining columns of the matrix representation [T]_{BC} for the other basis vectors in B
  • Determine the representation [v]_{B} of the vector v in terms of the basis B
  • Compute the transformation T(v) using the defined linear transformation
  • Explore the implications of changing the basis on the representation of vectors and transformations
USEFUL FOR

Students studying linear algebra, particularly those focusing on linear transformations, basis changes, and matrix representations. This discussion is beneficial for anyone needing to understand the application of linear transformations in vector spaces.

Maxwhale
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Homework Statement



T: R3 --> R2 by T(x,y,z) = (z-x , 2y -x)
v = (2, -1, -3)
B = {(0,0,1),(0,1,1),(1,1,1,)}
C = {(1,-1), (2,1)}

What is [T]BC
what is [v]B
and what is T(v)

Homework Equations



No clue

The Attempt at a Solution



I found out [T]B and that's where i am stuck.
 
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I'm pretty sure that [tex][T]_{BC}[/tex] is the matrix representation of T on the vectors in B, in terms of the basis vectors in C.

For example, T(b1) = T(0,0,1) = (1,0)
In terms of the basis in C, this is 1/3 (1, -1) + 1(2,1)

So the first column of [tex][T]_{BC}[/tex] is (1/3, 1) (written as a column vector).
You need to do this for the other two vectors in B.

[tex]v_B[/tex] is the representation of v in terms of the basis B.
T(v) is pretty straightforward.
 

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