𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Positive semi-definite matrices as sums of squares

✍ Scribed by Dragomir Ž. Djoković


Publisher
Elsevier Science
Year
1976
Tongue
English
Weight
288 KB
Volume
14
Category
Article
ISSN
0024-3795

No coin nor oath required. For personal study only.


📜 SIMILAR VOLUMES


Conservative perturbations of positive d
✍ P. Amodio; F. Iavernaro; D. Trigiante 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 85 KB

## Abstract We consider Hamiltonian matrices obtained by means of symmetric and positive definite matrices and analyse some perturbations that maintain the eigenvalues on the imaginary axis of the complex plane. To obtain this result we prove for such matrices the existence of a diagonal form or, a

Elliptic equations and products of posit
✍ Charles H. Conley; Patrizia Pucci; James Serrin 📂 Article 📅 2005 🏛 John Wiley and Sons 🌐 English ⚖ 290 KB

## Abstract We present necessary and sufficient conditions under which the symmetrized product of two __n__ ×__n__ positive definite Hermitian matrices is still a positive definite matrix (Part I, Sections 2 and 3). These results are then applied to prove the validity of the strong maximum principl