Find a transition matrix from bases?

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SUMMARY

The discussion focuses on finding the transition matrix Pab between two bases in the vector space P2. The bases are defined as a = {1, x, x^2} and b = {-2 - 2x + 3x^2, 1 + 2x - x^2, -1 - x + 2x^2}. To compute the transition matrix, one must express the coordinates of each vector in basis 'a' in terms of basis 'b' by solving a system of equations for each vector. This process involves determining the coefficients that represent the vectors of basis 'a' in the context of basis 'b', ultimately constructing the transition matrix from these coefficients.

PREREQUISITES
  • Understanding of vector spaces and bases in Linear Algebra
  • Familiarity with polynomial vector spaces, specifically P2
  • Ability to solve systems of linear equations
  • Knowledge of matrix representation of linear transformations
NEXT STEPS
  • Study the method for finding transition matrices between different bases in vector spaces
  • Learn how to express vectors in one basis in terms of another using systems of equations
  • Explore the properties of polynomial vector spaces, particularly P2
  • Practice solving linear equations to find coefficients for transition matrices
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Students and educators in Linear Algebra, mathematicians working with polynomial spaces, and anyone involved in transitioning between different bases in vector spaces.

proctortom
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Homework Statement


I have 2 bases, a = {1, x, x^2} and b = {-2 - 2x + 3x^2 , 1 + 2x - x^2 , -1 - x + 2x^2} of P2.

Find the transition matrix Pab.

How is this done??


Homework Equations


Since this is Linear Algebra, there aren't really any relevant "Equations" as such. More logic based. Right?



The Attempt at a Solution


I am quite muddled. Best I could get was to make [v]s = [1; 1; 1] (Thats a vertical matrix of 1s)

Not quite sure where to go from here.
 
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The transition matrix is computed with coordinates. For example, the coordinates of the vector 'x^2' in the ordered basis 'a' are (0, 0, 1). Now, write this in the coordinates in the basis 'b.' This can be done by solving a system of equations: x^2 = u_1 b_1 + u_2 b_2 + u_3 b_3 where u_i is an unknown coefficient (to be solved) and b_1, b_2, b_3 are elements in the ordered basis 'b.' Once solved for u_1, u_2, and u_3, the coordinates of x^2 in the ordered basis 'b' are (u_1, u_2, u_3). This gives the first column of the transition matrix. Do a similar thing for the remaining elements in the ordered basis 'a.'
 

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