Is Matrix A Similar to Its Row Echelon Form?

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SUMMARY

Matrix A is not similar to its row echelon form, whether reduced or non-reduced. Similar matrices share the same eigenvalues, but row operations, excluding row addition, alter the eigenvalues and the determinant of the matrix. Therefore, the transformation to row echelon form modifies the fundamental properties of matrix A, confirming that similarity is not preserved through these operations.

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Homework Statement


just wondering if A is similar to the reduced(or non-reduced) row echelon form of A


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The Attempt at a Solution

 
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not in general

similar matricies have the same eigenvalues

row operations, with the exception of row addition lead to changes in the eigenvalues and so the determinant of the matrix they are applied to
http://en.wikipedia.org/wiki/Elementary_matrix
 

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