linear algebra note

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线性代数
ssssss
kkkk
the dimension of the nullspace of this matrix (also called the nullity)
As we’ve seen in the last few quizzes, diagonal matrices -- i.e. those with 0 entries
everywhere except the diagonal -- are exceptionally easy to work with. For one, the
eigenvalues are simply the values along the diagonal, and the eigenvectors are just the
standard basis vectors.
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