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of 224
pro vyhledávání: '"Radu, B"'
Autor:
Munteanu, Radu B., Paunescu, Liviu
Denote by $Sof(G)$ the space of sofic representations of a countable group $G$. This space is known by a result of the second author, to have a convex-like structure. We show that, in this space, minimal faces are extreme points. We then construct un
Externí odkaz:
http://arxiv.org/abs/2107.01236
Autor:
Munteanu, Radu B.
In this paper we study the associated flow of some factors arising as fixed point algebras under product type actions on ITPFI factors. We compute their associated flow and show that under certain conditions these flows are approximately transitive a
Externí odkaz:
http://arxiv.org/abs/1811.10846
We consider the numerical approximation of acoustic wave propagation in the time domain by a mixed finite element method based on the BDM1-P0 spaces. A mass-lumping strategy for the BDM1 element, originally proposed by Wheeler and Yotov in the contex
Externí odkaz:
http://arxiv.org/abs/1803.04238
Publikováno v:
Ergodic Theory and Dynamical Systems 39(2019), 2881-2895
In this paper we show that the natural action of the symmetric group acting on the product space $\{0, 1 \}^{\mathbb{N}} $ endowed with a symmetric measure is approximately transitive. We also extend the result to a larger class of probability measur
Externí odkaz:
http://arxiv.org/abs/1707.00927
Publikováno v:
Ergod. Th. Dynam. Sys. 39 (2019) 3250-3261
We define a subgroup of the universal sofic group, obtained as the normaliser of a separable abelian subalgebra. This subgroup can be obtained as an extension by the group of automorphisms on a standard probability space. We show that each sofic repr
Externí odkaz:
http://arxiv.org/abs/1704.00814
Publikováno v:
IOP Conference Series: Materials Science & Engineering; 2024, Vol. 1319 Issue 1, p1-12, 12p
For any adic transformation $T$ defined on the path space $X$ of an ordered Bratteli diagram, endowed with a Markov measure $\mu$, we construct an explicit dimension space (which corresponds to a matrix values random walk on $\mathbb{Z}$) whose Poiss
Externí odkaz:
http://arxiv.org/abs/1510.05672
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In this paper we introduce the notion of multiplier of a Hilbert pro-$C^{\ast }$-bimodule and we investigate the structure of the multiplier bimodule of a Hilbert pro-$C^{\ast}$-bimodule. We also investigate the relationship between the crossed produ
Externí odkaz:
http://arxiv.org/abs/1412.2270
Autor:
Joita, Maria, Munteanu, Radu-B.
Publikováno v:
Studia Mathematica 255 (2014) 3, 249-258
In this paper we introduce a property of ergodic flows, called Property B. We prove that any ergodic hyperfinite equiva- lence relation of type III_o whose associated flow satisfies this property is not of product type. A consequence of this result i
Externí odkaz:
http://arxiv.org/abs/1412.2047