Abstract
Let \(G\) be an \(m\times m\)-matrix-valued rapidly decreasing distribution on \(\mathbb R^{n}\) and let \(E\) be one of the following locally convex vector spaces: \(\fancyscript{S}(\mathbb R^{n};\mathbb C^{m})\), \(\fancyscript{D}_{L^{2}}(\mathbb R^{n};\mathbb C^{m})\), \((\fancyscript{O}_{\mu })(\mathbb R^{n};\mathbb C^{m})\) where \(\mu \in [0,\infty \mathclose [\), \(\fancyscript{S}'(\mathbb R^{n};\mathbb C^{m})\). Then the convolution operator \((G\,*)|_{E}\) is equal to the infinitesimal generator of a one-parameter \((C_{0})\)-semigroup of operators belonging to \(L(E;E)\) if and only if the weak Petrovskiĭ condition is satisfied:
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Notes
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Independently of the theory of reflexivity, barrelledness of \(\fancyscript{S}(\mathbb R^{n};\mathbb C^{m})\) follows from the fact that \(\fancyscript{S}(\mathbb R^{n};\mathbb C^{m})\) is a Fréchet space.
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Kisyński, J. (2015). Convolution Operators as Generators of One-Parameter Semigroups. In: Banasiak, J., Bobrowski, A., Lachowicz, M. (eds) Semigroups of Operators -Theory and Applications. Springer Proceedings in Mathematics & Statistics, vol 113. Springer, Cham. https://doi.org/10.1007/978-3-319-12145-1_3
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