Variation of constants formula and exponential dichotomy for nonautonomous non-densely defined Cauchy problems
Keyword(s):
Abstract In this paper, we extend to the non-Hille–Yosida case a variation of constants formula for a nonautonomous and nonhomogeneous Cauchy problems first obtained by Gühring and Räbiger. By using this variation of constants formula, we derive a necessary and sufficient condition for the existence of an exponential dichotomy for the evolution family generated by the associated nonautonomous homogeneous problem. We also prove a persistence result of the exponential dichotomy for small perturbations. Finally, we illustrate our results by considering two examples. The first example is a parabolic equation with nonlocal and nonautonomous boundary conditions, and the second example is an age-structured model that is a hyperbolic equation.
2009 ◽
Vol 139
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pp. 459-482
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2019 ◽
Vol 479
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pp. 450-481
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2015 ◽
Vol 27
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pp. 261-281
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2001 ◽
Vol 356
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pp. 1087-1095
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2001 ◽
Vol 44
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pp. 203-225
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