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(a) What is the size of A?
(b) Is A invertible?
(c) How many eigenspaces does A have?
The eigenvectors that we have been studying are sometimes called right eigenvectors to
26. distinguish them from left eigenvectors, which are column matrices x that satisfy
for some scalar . What is the relationship, if any, between the right eigenvectors and
corresponding eigenvalues of A and the left eigenvectors and corresponding eigenvalues of A?
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