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Micro-local analysis in Fourier Lebesgue and modulation spaces: part II

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Abstract

We consider different types of (local) products f 1 f 2 in Fourier Lebesgue spaces. Furthermore, we prove the existence of such products for other distributions satisfying appropriate wave-front properties. We also consider semi-linear equations of the form

$$P(x,D)f = G(x,J_k f),$$

with appropriate polynomials P and G, where J k denotes the k-jet of f. If the solution locally belongs to appropriate weighted Fourier Lebesgue space \({\fancyscript{F}L^q_{(\omega )} (\mathbf{R}^d)}\) and P is non-characteristic at (x 0, ξ 0), then we prove that \({(x_0,\xi_0)\not \in {\rm WF}_{\fancyscript{F}L^q_{(\widetilde {\omega })}} (f)}\), where \({\widetilde{\omega }}\) depends on ω, P and G.

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Correspondence to Stevan Pilipović.

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Pilipović, S., Teofanov, N. & Toft, J. Micro-local analysis in Fourier Lebesgue and modulation spaces: part II. J. Pseudo-Differ. Oper. Appl. 1, 341–376 (2010). https://doi.org/10.1007/s11868-010-0013-2

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