Geodesic
On a Limiting Case for Pointwise Multiplication in Nikol'skii--Besov Spaces
Informatics and Automation, Function Spaces, Approximation Theory, and Related Problems of Analysis, Tome 312 (2021), pp. 170-187.

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We investigate the regularity of the set of all products $f\cdot g$ for $f$ and $g$ belonging to certain Nikol'skii–Besov spaces. The special situation we are interested in has been left open in earlier contributions. It represents a limiting situation. We list a number of positive and negative results, both in the inhomogeneous and in the homogeneous situation.
Keywords: pointwise multipliers, inhomogeneous Nikol'skii–Besov spaces, homogeneous Nikol'skii–Besov spaces
Mots-clés : paramultiplication. 
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Winfried Sickel. On a Limiting Case for Pointwise Multiplication in Nikol'skii--Besov Spaces. Informatics and Automation, Function Spaces, Approximation Theory, and Related Problems of Analysis, Tome 312 (2021), pp. 170-187. http://geodesic.mathdoc.fr/item/TRSPY_2021_312_a8/

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