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References to 'positive semidefinite'
1. complex Hessian matrix by jirka
2. determinant inequalities by Andrea Ambrosio
3. Hadamard's inequality by mathwizard
4. Laplacian matrix of a graph by Mathprof
5. Loewner ordering by mathcam
6. proof of Hadamard's inequality by Andrea Ambrosio
7. properties of diagonally dominant matrix by Andrea Ambrosio
8. quadratic form by CWoo
9. relations between Hessian matrix and local extrema by bshanks
10. Weyl's inequality by Andrea Ambrosio