Abstract
The family of anisotropic decomposition spaces of modulation and Triebel–Lizorkin type on $${\mathbb R}^n$$ is a large family of smoothness spaces that include classical Besov, Triebel–Lizorkin, modulation and $$\alpha $$ -modulation spaces. The decomposition space approach allows for a unified treatment of such smoothness spaces in both the isotropic and an anisotropic setting. We derive a boundedness result for Fourier multipliers on anisotropic decomposition spaces of modulation and Triebel–Lizorkin type. As an application, we obtain equivalent quasi-norm characterizations for this class of decomposition spaces.
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