[{"doi":"10.1090/tran/8113","department":[{"_id":"LaEr"}],"ec_funded":1,"abstract":[{"lang":"eng","text":"Recently Kloeckner described the structure of the isometry group of the quadratic Wasserstein space W_2(R^n). It turned out that the case of the real line is exceptional in the sense that there exists an exotic isometry flow. Following this line of investigation, we compute Isom(W_p(R)), the isometry group of the Wasserstein space\r\nW_p(R) for all p \\in [1,\\infty) \\setminus {2}. We show that W_2(R) is also exceptional regarding the\r\nparameter p: W_p(R) is isometrically rigid if and only if p is not equal to 2. Regarding the underlying\r\nspace, we prove that the exceptionality of p = 2 disappears if we replace R by the compact\r\ninterval [0,1]. Surprisingly, in that case, W_p([0,1]) is isometrically rigid if and only if\r\np is not equal to 1. Moreover, W_1([0,1]) admits isometries that split mass, and Isom(W_1([0,1]))\r\ncannot be embedded into Isom(W_1(R))."}],"scopus_import":"1","publication_identifier":{"eissn":["1088-6850"],"issn":["0002-9947"]},"_id":"7389","article_processing_charge":"No","keyword":["Wasserstein space","isometric embeddings","isometric rigidity","exotic isometry flow"],"publication_status":"published","ddc":["515"],"main_file_link":[{"open_access":"1","url":"https://arxiv.org/abs/2002.00859"}],"author":[{"last_name":"Geher","first_name":"Gyorgy Pal","full_name":"Geher, Gyorgy Pal"},{"full_name":"Titkos, Tamas","last_name":"Titkos","first_name":"Tamas"},{"full_name":"Virosztek, Daniel","id":"48DB45DA-F248-11E8-B48F-1D18A9856A87","last_name":"Virosztek","orcid":"0000-0003-1109-5511","first_name":"Daniel"}],"issue":"8","date_created":"2020-01-29T10:20:46Z","project":[{"name":"Geometric study of Wasserstein spaces and free probability","grant_number":"846294","call_identifier":"H2020","_id":"26A455A6-B435-11E9-9278-68D0E5697425"}],"intvolume":"       373","language":[{"iso":"eng"}],"date_published":"2020-08-01T00:00:00Z","date_updated":"2025-07-10T11:54:32Z","year":"2020","month":"08","volume":373,"arxiv":1,"user_id":"2DF688A6-F248-11E8-B48F-1D18A9856A87","publication":"Transactions of the American Mathematical Society","type":"journal_article","isi":1,"publisher":"American Mathematical Society","quality_controlled":"1","oa_version":"Preprint","day":"01","external_id":{"arxiv":["2002.00859"],"isi":["000551418100018"]},"oa":1,"title":"Isometric study of Wasserstein spaces - the real line","status":"public","page":"5855-5883","article_type":"original","citation":{"chicago":"Geher, Gyorgy Pal, Tamas Titkos, and Daniel Virosztek. “Isometric Study of Wasserstein Spaces - the Real Line.” <i>Transactions of the American Mathematical Society</i>. American Mathematical Society, 2020. <a href=\"https://doi.org/10.1090/tran/8113\">https://doi.org/10.1090/tran/8113</a>.","ista":"Geher GP, Titkos T, Virosztek D. 2020. Isometric study of Wasserstein spaces - the real line. Transactions of the American Mathematical Society. 373(8), 5855–5883.","ama":"Geher GP, Titkos T, Virosztek D. Isometric study of Wasserstein spaces - the real line. <i>Transactions of the American Mathematical Society</i>. 2020;373(8):5855-5883. doi:<a href=\"https://doi.org/10.1090/tran/8113\">10.1090/tran/8113</a>","apa":"Geher, G. P., Titkos, T., &#38; Virosztek, D. (2020). Isometric study of Wasserstein spaces - the real line. <i>Transactions of the American Mathematical Society</i>. American Mathematical Society. <a href=\"https://doi.org/10.1090/tran/8113\">https://doi.org/10.1090/tran/8113</a>","ieee":"G. P. Geher, T. Titkos, and D. Virosztek, “Isometric study of Wasserstein spaces - the real line,” <i>Transactions of the American Mathematical Society</i>, vol. 373, no. 8. American Mathematical Society, pp. 5855–5883, 2020.","mla":"Geher, Gyorgy Pal, et al. “Isometric Study of Wasserstein Spaces - the Real Line.” <i>Transactions of the American Mathematical Society</i>, vol. 373, no. 8, American Mathematical Society, 2020, pp. 5855–83, doi:<a href=\"https://doi.org/10.1090/tran/8113\">10.1090/tran/8113</a>.","short":"G.P. Geher, T. Titkos, D. Virosztek, Transactions of the American Mathematical Society 373 (2020) 5855–5883."}}]