In this work we establish that disconjugacy of a linear Hamiltonian system on time scales is a necessary condition for the positivity of the corresponding quadratic functional. We employ a certain minimal normality (controllability) assumption. Hence, the open problems stated by the author in [17],
Inhomogeneous Quadratic Functionals on Time Scales
✍ Scribed by Roman Hilscher
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- English
- Weight
- 84 KB
- Volume
- 253
- Category
- Article
- ISSN
- 0022-247X
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✦ Synopsis
In a previous paper by the author Math. Comput. Modelling 32 2000 , 507᎐527, . Linear Hamiltonian systems on time scales. Positivity of quadratic functionals a Ž . Ž . unified theory for continuous ޔ s ޒ and discrete ޔ s ޚ linear Hamiltonian systems on an arbitrary time scale ޔ is developed. In particular, it is stated that disconjugacy of the Hamiltonian system is a sufficient condition for positivity of the Ž . corresponding homogeneous quadratic functional. In this paper we present a Ž similar condition for quadratic functionals on time scales with general inhomoge-. neous boundary conditions.
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