Geodesic
Existence of invariant spaces and exponential dichotomies of solutions of dynamical Sobolev type equations in quasi-Banach spaces
Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika, Tome 7 (2015) no. 4, pp. 46-53 Cet article a éte moissonné depuis la source Math-Net.Ru

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At the end of the nineteenth century A. Poincare began to study equations which were unsolved with respect to high derivative equations. The systematical study of such equations began in S. L. Sobolev's works in the second part of the last century. Therefore, such equations are called Sobolev type equations. The increased interest to Sobolev type equations led to the necessity to consider them in quasi-Banach spaces. This article presents the results of the existence of exponential dichotomies of solutions of dynamical Sobolev type equations studied in quasi-Banach spaces. The relatively spectral theorem and the problem of the existence of invariant solution spaces were considered. The interest to such solution is explained by the fact that it is the most popular and reflects experimental data while solving practical tasks. Besides the introduction and the references the article contains two parts. The first part provides necessary notions and a relatively spectral theorem in quasi-Banach spaces. The second one represents the existence of invariant spaces and exponential dichotomies of solutions of the dynamical Sobolev type equation in quasi-Banach spaces.
Keywords: quasi-Sobolev space; relatively spectral theorem; invariant spaces; exponential dichotomies of solutions; Sobolev type equations. 
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     journal = {Vestnik \^U\v{z}no-Uralʹskogo gosudarstvennogo universiteta. Seri\^a, Matematika, mehanika, fizika},
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M. A. Sagadeeva; F. L. Hasan. Existence of invariant spaces and exponential dichotomies of solutions of dynamical Sobolev type equations in quasi-Banach spaces. Vestnik Ûžno-Uralʹskogo gosudarstvennogo universiteta. Seriâ, Matematika, mehanika, fizika, Tome 7 (2015) no. 4, pp. 46-53. http://geodesic.mathdoc.fr/item/VYURM_2015_7_4_a5/

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