Geodesic
Convexity of the Stability Region of Hurwitz Systems of Differential Equations
Bulletin of the Malaysian Mathematical Society, Tome 24 (2001) no. 1 
Ziad Zahreddine. Convexity of the Stability Region of Hurwitz Systems
                          of Differential Equations. Bulletin of the Malaysian Mathematical Society, Tome 24 (2001) no. 1. http://geodesic.mathdoc.fr/item/BMMS_2001_24_1_a0/
@article{BMMS_2001_24_1_a0,
     author = {Ziad Zahreddine},
     title = {Convexity of the {Stability} {Region} of {Hurwitz} {Systems
}                          of {Differential} {Equations}},
     journal = {Bulletin of the Malaysian Mathematical Society},
     year = {2001},
     volume = {24},
     number = {1},
     url = {http://geodesic.mathdoc.fr/item/BMMS_2001_24_1_a0/}
}
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                          of Differential Equations
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                          of Differential Equations
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Voir la notice de l'article provenant de la source BMMS

In a recent paper, the problem of stability of systems of differential equations was approached from a geometric perspective. In the present work, we continue in this line and we show the convexity of the family of systems of differential equations which are Hurwitz stable and whose characteristic polynomials are mapped into the space of Markov parameters.