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feat(MatrixNorm/TraceNorm): trace-norm/SVD/Hölder API#1076

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dennj:trace
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feat(MatrixNorm/TraceNorm): trace-norm/SVD/Hölder API#1076
dennj wants to merge 1 commit intoleanprover-community:masterfrom
dennj:trace

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@dennj dennj commented May 3, 2026

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/-- Singular value decomposition for square complex matrices, with singular values expressed as
square roots of the eigenvalues of `Aᴴ * A`. -/
theorem exists_svd_sqrt_eigenvalues (A : Matrix n n ℂ) :
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Maybe put this in a separate file? Doesn't look too related to the tracenorm?

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