We prove that for a suitable class of metric measure spaces the abstract notion of tangent module as defined by the first author can be isometrically identified with the space of L2-sections of the ‘Gromov-Hausdorff tangent bundle’. The key assumption that we make is a form of rectifiability for which the space is ‘almost isometrically’ rectifiable (up to m-null sets) via maps that keep under control the reference measure. We point out that RCD∗(K, N) spaces fit in our framework.
Equivalence of two different notions of tangent bundle on rectifiable metric measure spaces / Gigli, N.; Pasqualetto, E.. - In: COMMUNICATIONS IN ANALYSIS AND GEOMETRY. - ISSN 1019-8385. - 30:1(2022), pp. 1-51. [10.4310/CAG.2022.V30.N1.A1]
Equivalence of two different notions of tangent bundle on rectifiable metric measure spaces
Gigli N.;Pasqualetto E.
2022-01-01
Abstract
We prove that for a suitable class of metric measure spaces the abstract notion of tangent module as defined by the first author can be isometrically identified with the space of L2-sections of the ‘Gromov-Hausdorff tangent bundle’. The key assumption that we make is a form of rectifiability for which the space is ‘almost isometrically’ rectifiable (up to m-null sets) via maps that keep under control the reference measure. We point out that RCD∗(K, N) spaces fit in our framework.File | Dimensione | Formato | |
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