Linear Transformation and Inner Product Problem

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SUMMARY

The discussion focuses on a linear transformation problem within the vector space R², utilizing the standard inner product defined as ⟨(a, b), (c, d)⟩ = ac + bd. The transformation T is expressed as T(v) = A^T * v, where A represents the matrix of the transformation. The user successfully solved part a but seeks assistance with part b, specifically regarding the standard representation of T in an orthonormal basis. The suggested approach involves using the independent vectors (1,0) and (0,1) to determine the matrix elements of the transformation.

PREREQUISITES
  • Understanding of linear transformations and their matrix representations.
  • Familiarity with inner product spaces, specifically in R².
  • Knowledge of orthonormal bases and their significance in linear algebra.
  • Proficiency in matrix multiplication and vector notation.
NEXT STEPS
  • Study the properties of linear transformations in R².
  • Learn how to compute the matrix representation of a linear transformation using an orthonormal basis.
  • Explore the concept of eigenvalues and eigenvectors in the context of linear transformations.
  • Review examples of inner product spaces and their applications in various mathematical problems.
USEFUL FOR

Students studying linear algebra, educators teaching vector spaces, and anyone interested in mastering linear transformations and inner product spaces.

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Homework Statement


  1. Consider the vector space R2 with the standard inner product given by ⟨(a, b), (c, d)⟩ = ac + bd. (This is just the dot product.)

    PLEASE SEE THE ATTACHED PHOTO FOR DETAIlS

Homework Equations


T(v)=AT*v

The Attempt at a Solution


I was able to prove part a. I let v=(v1,v2) and w=(w1,w2)
apply T(v)=AT*v and do the expansions easily yields the result

But for part b I am clueless. Please suggest an attempt
 

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Hint: the expression 'standard representation of ##T##' means 'representation of ##T## in an orthonormal basis'.
 
You can choose any pair of independent vectors u and v to find the matrix elements of the transformation T. Let be these two vectors the base vectors of R2, (1,0) and (0,1).
 

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