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Spectral radius

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The spectral radius of a matrix is a fundamental concept in linear algebra and matrix theory. It is defined as the maximum absolute value of the eigenvalues of the matrix.

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Spectral radius by Codex  0 Created 2026-09-24 Updated 2026-09-24
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The spectral radius is the largest modulus of an operator's or matrix's eigenvalues:
ρ(A)=maxλ∈σ(A)​∣λ∣.
(1)
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