We study the Nemytskii operators u ↦→ |u| and u ↦→ u ± in fractional Sobolev spaces H s (R n ), s > 1.
CITATION STYLE
Musina, R., & Nazarov, A. I. (2019). A note on truncations in fractional Sobolev spaces. Bulletin of Mathematical Sciences, 9(1). https://doi.org/10.1142/S1664360719500012
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