[Une preuve courte de la Hilbertianité infinitésimale de l’espace euclidien à poids]
Nous fournissons une preuve courte du résultat connu suivant : l’espace de Sobolev associé à l’espace euclidien muni de sa distance euclidienne et d’une mesure arbitraire de Radon, est un espace d’Hilbert. Notre nouvelle approche repose sur des propriétés du fibré de décomposabilité introduit par Alberti et Marchese. En conséquence de nos arguments, nous prouvons aussi que si la norme de Sobolev est fermable dans les fonctions lisses à support compact, la mesure de référence est absolument continue par rapport à la mesure de Lebesgue.
We provide a quick proof of the following known result: the Sobolev space associated with the Euclidean space, endowed with the Euclidean distance and an arbitrary Radon measure, is Hilbert. Our new approach relies upon the properties of the Alberti–Marchese decomposability bundle. As a consequence of our arguments, we also prove that if the Sobolev norm is closable on compactly-supported smooth functions, then the reference measure is absolutely continuous with respect to the Lebesgue measure.
Révisé le :
Accepté le :
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Simone Di Marino 1 ; Danka Lučić 2 ; Enrico Pasqualetto 2
CC-BY 4.0
@article{CRMATH_2020__358_7_817_0,
author = {Simone Di Marino and Danka Lu\v{c}i\'c and Enrico Pasqualetto},
title = {A short proof of the infinitesimal {Hilbertianity} of the weighted {Euclidean} space},
journal = {Comptes Rendus. Math\'ematique},
pages = {817--825},
publisher = {Acad\'emie des sciences, Paris},
volume = {358},
number = {7},
year = {2020},
doi = {10.5802/crmath.88},
language = {en},
}
TY - JOUR AU - Simone Di Marino AU - Danka Lučić AU - Enrico Pasqualetto TI - A short proof of the infinitesimal Hilbertianity of the weighted Euclidean space JO - Comptes Rendus. Mathématique PY - 2020 SP - 817 EP - 825 VL - 358 IS - 7 PB - Académie des sciences, Paris DO - 10.5802/crmath.88 LA - en ID - CRMATH_2020__358_7_817_0 ER -
%0 Journal Article %A Simone Di Marino %A Danka Lučić %A Enrico Pasqualetto %T A short proof of the infinitesimal Hilbertianity of the weighted Euclidean space %J Comptes Rendus. Mathématique %D 2020 %P 817-825 %V 358 %N 7 %I Académie des sciences, Paris %R 10.5802/crmath.88 %G en %F CRMATH_2020__358_7_817_0
Simone Di Marino; Danka Lučić; Enrico Pasqualetto. A short proof of the infinitesimal Hilbertianity of the weighted Euclidean space. Comptes Rendus. Mathématique, Volume 358 (2020) no. 7, pp. 817-825. doi : 10.5802/crmath.88. https://comptes-rendus.academie-sciences.fr/mathematique/articles/10.5802/crmath.88/
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