The stabilization problem of systems with a skew-adjoint operator in a Hilbert space is considered. We prove that an one dimensional stabilizing feedback control allows a wide class of perturbations such that the system under consideration is strongly stabilizable with the aim of the perturbed contr
✦ LIBER ✦
Rolle's Theorem for Polynomials of Degree Four in a Hilbert Space
✍ Scribed by Jesús Ferrer
- Publisher
- Elsevier Science
- Year
- 2002
- Tongue
- English
- Weight
- 91 KB
- Volume
- 265
- Category
- Article
- ISSN
- 0022-247X
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✦ Synopsis
In an infinite-dimensional real Hilbert space, we introduce a class of fourthdegree polynomials which do not satisfy Rolle's Theorem in the unit ball. Extending what happens in the finite-dimensional case, we show that every fourth-degree polynomial defined by a compact operator satisfies Rolle's Theorem.
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