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How eigenvalues are calculated?

Updated: 9/19/2023
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An eigenvector of a square matrix Ais a non-zero vector v that, when the matrix is multiplied by v, yields a constant multiple of v, the multiplier being commonly denoted by lambda. That is: Av = lambdav

The number lambda is called the eigenvalue of A corresponding to v.
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Q: How eigenvalues are calculated?
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