Search Results - "Sasyk, Román"
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1
Effective Hilbert’s irreducibility theorem for global fields
Published in Israel journal of mathematics (01-06-2024)“…We prove an effective form of Hilbert’s irreducibility theorem for polynomials over a global field K . More precisely, we give effective bounds for the number…”
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2
Metric approximations of unrestricted wreath products when the acting group is amenable
Published in Communications in algebra (04-03-2022)“…We give a simple and unified proof showing that the unrestricted wreath product of a weakly sofic, sofic, linear sofic, or hyperlinear group by an amenable…”
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3
Turbulence and Araki–Woods factors
Published in Journal of functional analysis (01-11-2010)“…Using Baire category techniques we prove that Araki–Woods factors are not classifiable by countable structures. As a result, we obtain a far reaching…”
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4
Permanence properties of verbal products and verbal wreath products of groups
Published in Groups, geometry and dynamics (01-07-2022)“…By means of analyzing the notion of verbal products of groups, we show that soficity, hyperlinearity, amenability, the Haagerup property, the Kazhdan property…”
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5
Borel Reducibility and Classification of Von Neumann Algebras
Published in The bulletin of symbolic logic (01-06-2009)“…We announce some new results regarding the classification problem for separable von Neumann algebras. Our results are obtained by applying the notion of Borel…”
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6
The classification problem for von Neumann factors
Published in Journal of functional analysis (15-04-2009)“…We prove that it is not possible to classify separable von Neumann factors of types II 1 , II ∞ or III λ , 0 ⩽ λ ⩽ 1 , up to isomorphism by a Borel measurable…”
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7
Borel Reductibility and Classification of von Neumann Algebras
Published in The bulletin of symbolic logic (01-06-2009)“…We announce some new results regarding the classification problem for separable von Neumann algebras. Our results are obtained by applying the notion of Borel…”
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8
A note on the classification of Gamma factors
Published 18-07-2019“…Rev. Un. Mat. Argentina 57 (2016), no. 1, 1--7 One of the earliest invariants introduced in the study of finite von Neumann algebras is the property Gamma of…”
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9
Permanence properties of verbal products and verbal wreath products of groups
Published 26-04-2022“…Groups Geom. Dyn. 16 (2022), no. 2, pp. 363-401 By means of analyzing the notion of verbal products of groups, we show that soficity, hyperlinearity,…”
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10
Effective Hilbert's Irreducibility Theorem for global fields
Published 21-02-2022“…We prove an effective form of Hilbert's irreducibility theorem for polynomials over a global field $K$. More precisely, we give effective bounds for the number…”
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11
Uniform bounds for the number of rational points on varieties over global fields
Published 12-11-2021“…Algebra and Number Theory, Vol. 16 2022, No. 8, 1941-2000 We extend the work of Salberger; Walsh; Castryck, Cluckers, Dittmann and Nguyen; and Vermeulen to…”
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12
Metric approximations of unrestricted wreath products when the acting group is amenable
Published 12-11-2021“…Comm. Algebra 50 (2022), no. 3, 949--961 We give a simple and unified proof showing that the unrestricted wreath product of a weakly sofic, sofic, linear…”
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13
The inverse sieve problem for algebraic varieties over global fields
Published 02-04-2020“…Rev. Mat. Iberoam. 37 (2021), 2245-2284 Let $K$ be a global field and let $Z$ be a geometrically irreducible algebraic variety defined over $K$. We show that…”
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14
Non-classification of free Araki-Woods factors and $\tau$-invariants
Published 24-08-2017“…Groups Geom. Dyn. 13 (2019), 1219-1234 We define the standard Borel space of free Araki-Woods factors and prove that their isomorphism relation is not…”
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15
Permanence properties of the second nilpotent product of groups
Published 18-07-2019“…Bull. Belg. Math. Soc. Simon Stevin, Volume 26, Number 5 (2019), 725-742 We show that amenability, the Haagerup property, the Kazhdan's property (T) and…”
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16
An ultrapower construction of the multiplier algebra of a $C^{\ast}$-algebra and an application to boundary amenability of groups
Published 18-03-2019“…Adv. Oper. Theory, Volume 4, Number 4 (2019), 852-864 Using ultrapowers of $C^{\ast}$-algebras we provide a new construction of the multiplier algebra of a…”
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17
On II 1 factors arising from 2-cocycles of w-rigid groups
Published in Journal of functional analysis (2007)“…We consider II 1 factors L μ ( G ) arising from 2-cocyles μ ∈ H 2 ( G , T ) on groups G containing infinite normal subgroups H ⊂ G with the relative property (…”
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18
Turbulence and Araki-Woods factors
Published 08-12-2009“…Using Baire category techniques we prove that Araki-Woods factors are not classifiable by countable structures. As a result, we obtain a far reaching…”
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19
Borel reducibility and classification of von Neumann algebras
Published 14-09-2009“…The Bulletin of Symbolic Logic, Volume 15, Number 2, June 2009, pp. 169 - 183 We announce some new results regarding the classification problem for separable…”
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20
The classification problem for von Neumann factors
Published 25-03-2009“…We prove that it is not possible to classify separable von Neumann factors of types $\II_1$, $\II_\infty$ or $\III_\lambda$, $0\leq \lambda\leq1$, up to…”
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