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Zapiski Nauchnykh Seminarov POMI, 2016, Volume 448, Pages 236–245
(Mi znsl6313)
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This article is cited in 1 scientific paper (total in 1 paper)
Wishart–Pickrell distributions and closures of group actions
Yu. A. Neretinabcd a University of Vienna, Vienna, Austria
b State Scientific Center of the Russian Federation - Institute for Theoretical and Experimental Physics, Moscow, Russia
c Lomonosov Moscow State University, Moscow, Russia
d Institute for Information Transmission Problems of the Russian Academy of Sciences (Kharkevich Institute), Moscow, Russia
Abstract:
Consider probability distributions on the space of infinite Hermitian matrices $\mathrm{Herm}(\infty)$ invariant with respect to the unitary group $\mathrm U(\infty)$. We describe the closure of $\mathrm U(\infty)$ in the space of spreading maps (polymorphisms) of $\mathrm{Herm}(\infty)$; this closure is a semigroup isomorphic to the semigroup of all contractive operators.
Key words and phrases:
polymorphism, invariant measures, ergodic actions.
Received: 06.09.2016
Citation:
Yu. A. Neretin, “Wishart–Pickrell distributions and closures of group actions”, Representation theory, dynamical systems, combinatorial methods. Part XXVII, Zap. Nauchn. Sem. POMI, 448, POMI, St. Petersburg, 2016, 236–245; J. Math. Sci. (N. Y.), 224:2 (2017), 328–334
Linking options:
https://www.mathnet.ru/eng/znsl6313 https://www.mathnet.ru/eng/znsl/v448/p236
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Abstract page: | 197 | Full-text PDF : | 43 | References: | 32 |
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