6533b82ffe1ef96bd1295b73

RESEARCH PRODUCT

Traces of weighted function spaces: dyadic norms and Whitney extensions

Zhuang WangTomás SotoPekka Koskela

subject

Pure mathematicsTrace (linear algebra)Function spaceGeneral MathematicsDyadic cubesTriebel-Lizorkin spacesweighted Sobolev spaces01 natural sciencesfunktioanalyysiOperator (computer programming)trace theoremsClassical Analysis and ODEs (math.CA)FOS: Mathematics46E350101 mathematicsfunktioavaruudetMathematicsSmoothness (probability theory)010102 general mathematicsExtension (predicate logic)010101 applied mathematicsSobolev spacesovellettu matematiikkaMathematics - Classical Analysis and ODEsBesov spacesVariety (universal algebra)

description

The trace spaces of Sobolev spaces and related fractional smoothness spaces have been an active area of research since the work of Nikolskii, Aronszajn, Slobodetskii, Babich and Gagliardo among others in the 1950's. In this paper we review the literature concerning such results for a variety of weighted smoothness spaces. For this purpose, we present a characterization of the trace spaces (of fractional order of smoothness), based on integral averages on dyadic cubes, which is well adapted to extending functions using the Whitney extension operator.

yearjournalcountryeditionlanguage
2017-01-01
http://arxiv.org/abs/1708.04902