Consider the following linear transformations in R3: R1: Counterclockwise rotation about the positive x-axis through an angle v R2: Reflection about the x-z plane R3: Orthogonal projection on to the x-y plane R4: Dilation by a positive factor k It turns out that the composition (in any order) of the above transformations has no inverse transformation. Which transformation(s) in the composition may be causing this absence of an inverse transformation?

Linear Algebra: A Modern Introduction
4th Edition
ISBN:9781285463247
Author:David Poole
Publisher:David Poole
Chapter6: Vector Spaces
Section6.4: Linear Transformations
Problem 34EQ
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Let's say a linear transformation maps a vector m to a vector n, the inverse map of that linear transformation will map the vector n back to vector m. Similarly, the inverse map of an entire composition of linear transformations can be deduced as well. But, it is important to note that the inverse map may not always exist.

Consider the following linear transformations in R3:

  1. R1: Counterclockwise rotation about the positive x-axis through an angle v
  2. R2: Reflection about the x-z plane
  3. R3: Orthogonal projection on to the x-y plane
  4. R4: Dilation by a positive factor k

It turns out that the composition (in any order) of the above transformations has no inverse transformation. Which transformation(s) in the composition may be causing this absence of an inverse transformation?

 

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