Around Ovsyannikov's method

We study existence, uniqueness, and a limiting behaviour of solutions to an abstract linear evolution equation in a scale of Banach spaces. The generator of the equation is a perturbation of the operator which satisfies the classical assumptions of Ovsyannikov's method by a generator of a C_0-semigroup acting in each of the spaces of the scale. The results are (slightly modified) abstract version of those considered in [Math. Models Methods Appl. Sci., 25, 2, 2015, pp.343-370] for a particular equation. An application to a birth-and-death stochastic dynamics in the continuum is considered.

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