A Lean 4 formalization of fundamental theorems in matrix analysis, including the Courant-Fischer min-max theorem, Singular Value Decomposition (SVD), Frobenius norm properties, and the Eckart-Young theorem.

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A Lean 4 formalization of fundamental theorems in matrix analysis, including the Courant-Fischer min-max theorem, Singular Value Decomposition (SVD), Frobenius norm properties, and the Eckart-Young theorem.

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