Positive Semi-Definite Matrix 2: Spectral Theorem

Matrix Theory: Following Part 1, we note the recipe for constructing a (Hermitian) PSD matrix and provide a concrete example of the PSD square root. We prove the Spectral Theorem for C^n in the remaining 9 minutes.

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Hi bob. Can u explain positive semidefinite matrices from fuzhen zhang book. I wanna to know proof on theorem 7.1 till 7.4