Besov Characteristic of a Distribution
نویسندگان
چکیده
The Besov characteristic of a distribution f is the function sf defined for 0 ≤ t < ∞ by sf (t) = sup{ s ∈ R; f ∈ B 1/t,1(Rn) }. We give in this paper a criterion for a function Γ defined on [0,+∞[ to be the Besov characteristic of a distribution. Generalizations of this criterion to particular weighted Besov spaces and to anisotropic Besov spaces are also given.
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