Matrix Representation of Differentiation Operator for Subspace S in C[a,b]

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SUMMARY

The discussion focuses on finding the matrix representation of the differentiation operator D for the subspace S of C[a,b], which is spanned by the functions e^x, xe^x, and (x^2)e^x. To achieve this, participants are advised to apply the differentiation operator to each basis function and express the results as linear combinations of the original basis. This method will facilitate the construction of the matrix representation of D with respect to the specified basis.

PREREQUISITES
  • Understanding of linear transformations and their matrix representations
  • Familiarity with differentiation of exponential functions
  • Knowledge of linear combinations in vector spaces
  • Basic concepts of function spaces, specifically C[a,b]
NEXT STEPS
  • Study the process of finding matrix representations of linear transformations
  • Learn about the properties of the differentiation operator in function spaces
  • Explore the concept of basis and span in vector spaces
  • Investigate the application of linear combinations in constructing matrices
USEFUL FOR

Mathematicians, students studying functional analysis, and anyone interested in linear algebra applications in differential operators.

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Another problem I can't figure out how to start.

Let S be the subspace of C[a,b] spanned by e^x , xe^x , (x^2)e^x . Let D be the differentiation operator of S. Find the matrix representing D with respect to [e^x, xe^x, (x^2)e^x ]
 
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Well, what have you tried? Do you know how to find a matrix representing a linear transformation?
 
Hint

Hint: Try using the differential operator on each of your bases and then see if you can rewrite each of the results as a linear combination of the bases. After that you may wish to consider the relevance of the coordinate vectors of your results.
 

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