We introduce a class of pairs of operators defining a linear homogeneous degenerate evolution fractional differential equation in a Banach space. Reflexive Banach spaces are represented as the direct sums of the phase space of the equation and the kernel of the operator at the fractional derivative. In a sector of the complex plane containing the positive half-axis, we construct an analytic family of resolving operators that degenerate only on the kernel. The results are used in the study of the solvability of initial-boundary value problems for partial differential equations containing fractional time-derivatives and polynomials in the Laplace operator with respect to the spatial variable.
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Translated from Sibirskii Zhurnal Chistoi i Prikladnoi Matematiki 16, No. 2, 2016, pp. 93-107.
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Fedorov, V.E., Romanova, E.A. & Debbouche, A. Analytic in a Sector Resolving Families of Operators for Degenerate Evolution Fractional Equations. J Math Sci 228, 380–394 (2018). https://doi.org/10.1007/s10958-017-3629-4
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DOI: https://doi.org/10.1007/s10958-017-3629-4