Let $A$ be a matrix. What is the meaning of $λ_k$ is the eigenvalue with $k$-th largest absolute value?
2026-04-06 05:58:46.1775455126
What is the meaning of k-th largest absolute value?
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After the eigen decomposition, you can order the eigenvalues. The k-th largest eigenvalue is $\lambda_k$, which is usually the k-th most important eigenvalue of the decomposed matrix.