The Gromov-Hausdorff distance between the cloud of bounded metric spaces and the cloud containing the real line is infinite, and a criterion for such infinite cloud distances is proved.
Extendability of Metric Segments in Gromov--Hausdorff Distance
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In this paper geometry of Gromov-Hausdorff distance on the class of all metric spaces considered up to an isometry is investigated. For this class continuous curves and their lengths are defined, and it is shown that the Gromov-Hausdorff distance is intrinsic. Besides, metric segments are considered, i.e., the classes of points lying between two given ones, and an extension problem of such segments beyond their end-points is considered.
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On the Gromov-Hausdorff distance between the cloud of bounded metric spaces and a cloud with nontrivial stabilizer
The Gromov-Hausdorff distance between the cloud of bounded metric spaces and the cloud containing the real line is infinite, and a criterion for such infinite cloud distances is proved.