Abstract
In an infinite-dimensional Teichmüller space, it is known that the geodesic connecting two points can be unique or not. In this paper, we study the situation on the geodesic in the universal asymptotic Teichmüller space \(AT(\Delta )\). We introduce the notions of substantial point and non-substantial point in \(AT(\Delta )\). The set of all non-substantial points is open and dense in \(AT(\Delta )\). It is shown that there are infinitely many geodesics joining a non-substantial point to the basepoint. Although we have difficulty in dealing with the substantial points, we give an example to show that there are infinitely many geodesics connecting a certain substantial point and the basepoint. It is also shown that there are always infinitely many straight lines containing two points in \(AT(\Delta )\).
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The work was supported by the National Natural Science Foundation of China (Grant No. 11271216).
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Yao, G. On Nonuniqueness of Geodesics in Asymptotic Teichmüller Space . J Geom Anal 27, 1445–1467 (2017). https://doi.org/10.1007/s12220-016-9726-7
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DOI: https://doi.org/10.1007/s12220-016-9726-7