Nous prouvons qu’un espace métrique mesuré équipé d’une forme de Dirichlet admettant un noyau de la chaleur euclidien est nécessairement isométrique à l’espace euclidien. Nous en déduisons une preuve alternative du célèbre théorème de presque rigidité du volume de Colding grâce à une version quantitative de notre résultat principal. Nous traitons aussi le cas d’un espace métrique mesuré équipé d’une forme de Dirichlet admettant un noyau de la chaleur sphérique.
We prove that a metric measure space equipped with a Dirichlet form admitting an Euclidean heat kernel is necessarily isometric to the Euclidean space. This helps us providing an alternative proof of Colding’s celebrated almost rigidity volume theorem via a quantitative version of our main result. We also discuss the case of a metric measure space equipped with a Dirichlet form admitting a spherical heat kernel.
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Keywords: Heat kernel, harmonic functions, asymptotic cone
Mot clés : Noyau de la chaleur, fonctions harmoniques, cône asymptotique
Gilles Carron 1 ; David Tewodrose 2
@article{JEP_2022__9__101_0, author = {Gilles Carron and David Tewodrose}, title = {A rigidity result for metric measure spaces with {Euclidean} heat kernel}, journal = {Journal de l{\textquoteright}\'Ecole polytechnique {\textemdash} Math\'ematiques}, pages = {101--154}, publisher = {\'Ecole polytechnique}, volume = {9}, year = {2022}, doi = {10.5802/jep.179}, language = {en}, url = {https://jep.centre-mersenne.org/articles/10.5802/jep.179/} }
TY - JOUR AU - Gilles Carron AU - David Tewodrose TI - A rigidity result for metric measure spaces with Euclidean heat kernel JO - Journal de l’École polytechnique — Mathématiques PY - 2022 SP - 101 EP - 154 VL - 9 PB - École polytechnique UR - https://jep.centre-mersenne.org/articles/10.5802/jep.179/ DO - 10.5802/jep.179 LA - en ID - JEP_2022__9__101_0 ER -
%0 Journal Article %A Gilles Carron %A David Tewodrose %T A rigidity result for metric measure spaces with Euclidean heat kernel %J Journal de l’École polytechnique — Mathématiques %D 2022 %P 101-154 %V 9 %I École polytechnique %U https://jep.centre-mersenne.org/articles/10.5802/jep.179/ %R 10.5802/jep.179 %G en %F JEP_2022__9__101_0
Gilles Carron; David Tewodrose. A rigidity result for metric measure spaces with Euclidean heat kernel. Journal de l’École polytechnique — Mathématiques, Tome 9 (2022), pp. 101-154. doi : 10.5802/jep.179. https://jep.centre-mersenne.org/articles/10.5802/jep.179/
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