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Topics: Radio Program, Western Europe, Northern Europe, Military, Team sports, Sports originating in...

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Topics: Radio Program, Political science, National security, Military, British Armed Forces, Military of...

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Topics: Radio Program, Mass media, Decision theory, Scotland, Mountains, Solicitors, Legal professions,...

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Topics: Radio Program, 2nd millennium, South Yorkshire, Meteorology, Bathing, Broadcasting, Early Modern...

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Topics: Radio Program, Metropolitan counties, Greater Manchester, Members of the United Kingdom Parliament...

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Topics: Radio Program, Christmas decorations, Christmas traditions, Christmas, Christmas characters,...

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Topics: Radio Program, Christmas traditions, Market structure and pricing, Diplomacy, Christmas trees,...

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Topics: Radio Program, British Armed Forces, Military of the United Kingdom, English-language singers,...

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Topics: Radio Program, BBC Television programmes, East Asian countries, Divided regions, Republics, G20...

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Topics: Radio Program, Christmas traditions, Christmas, Mass media, Christmas in Germany, Santa Claus,...

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Topics: Radio Program, Brighton and Hove, Corporate executives, Law enforcement, Travel, Sustainable...

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Topics: Radio Program, Holiday-related topics, Christmas decorations, Car body styles, Topology, Group...

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Topics: Radio Program, Decision theory, Language, Elections, Politics of the United Kingdom, Members of the...

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Topics: Radio Program, Sex crimes, Chief executive officers, Bullying, Mass media, Real estate, Business...

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Topics: Radio Program, Diplomacy, Christmas trees, Christmas traditions, Parenting, Group theory, Topology,...

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Topics: Radio Program, Political science, National security, Family, Military, Grade I listed buildings in...

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Topics: Radio Program, Military, Western Europe, Sports originating in England, Northern Europe, Island...

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Topics: Radio Program, Diplomacy, Demography, Christmas trees, Christmas traditions, Holiday-related...

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Topics: Radio Program, Republics, Member states of the United Nations, Charlemagne Prize, Chief executive...

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Topics: Radio Program, Divided regions, East Asian countries, Republics, Member states of the United...

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Topics: Radio Program, Political science, Management, Dresses, Hydrology, Member states of the United...

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Topics: Radio Program, Diplomacy, Political science, Chief executive officers, Lists of government...

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Topics: Radio Program, Space agencies, Law, Windows software, Economics, Personhood, Abuse, Human rights,...

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Topics: Radio Program, Divided regions, East Asian countries, Political terminology, Republics, Personhood,...

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Topics: Radio Program, Antioxidants, Muscular system, Green tea, Dietary antioxidants, Tea, Dietary...

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Topics: Radio Program, Elections, Clothing retailers of the United Kingdom, Local government in the United...

Topics: Radio Program, Royal titles, Member states of the Organisation of Islamic Cooperation, American...

Topics: Radio Program, Western Asia, Royal titles, Member states of the Organisation of Islamic...

3
3.0

Mar 25, 2021
03/21

by
Marks, Jennifer, 1979-

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32 p. : 27 cm

Topics: Group theory -- Juvenile literature, Colors -- Juvenile literature

0
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x, 386 pages ; 25 cm

Topics: Probabilities -- Congresses, Group theory -- Congresses, Stochastic processes -- Congresses,...

Topics: Radio Program, Spiritualism, Marketing, American Freemasons, Health promotion, Professional...

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Topics: Radio Program, Hospitals, Federal republics, Least developed countries, Chief executive officers,...

The full text of the discussion paper presented at the Whither Turbulence Workshop on the potential and limitations of direct and large-eddy simulations is provided. Particular emphasis is placed on discussing the role of numerics and mathematical theory in direct simulations of both compressible and incompressible flows. A variety of unresolved issues with large-eddy simulations such as their implementation in high-order finite difference codes, problems with defiltering, and modifications to...

Topics: NASA Technical Reports Server (NTRS), COMPRESSIBLE FLOW, COMPUTERIZED SIMULATION, GROUP THEORY,...

Topics: Radio Program, Cooking utensils, Christmas traditions, Foods, Topology, Garden features,...

7
7.0

Jun 30, 2018
06/18

by
Corina Ciobotaru

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We provide a unified proof of all known examples of locally compact groups that enjoy the Howe-Moore property, namely, the vanishing at infinity of all matrix coefficients of the group unitary representations that are without non-zero invariant vectors. These examples are: connected, non-compact, simple real Lie groups with finite center, isotropic simple algebraic groups over non Archimedean local fields and closed, topologically simple subgroups of Aut(T) that act 2-transitively on the...

Topics: Mathematics, Representation Theory, Group Theory

Source: http://arxiv.org/abs/1403.0223

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11

Jun 30, 2018
06/18

by
Matt Clay

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We show that a right-angled Artin group, defined by a graph $\Gamma$ that has at least three vertices, does not split over an infinite cyclic subgroup if and only if $\Gamma$ is biconnected. Further, we compute JSJ--decompositions of 1--ended right-angled Artin groups over infinite cyclic subgroups.

Topics: Mathematics, Group Theory

Source: http://arxiv.org/abs/1403.1842

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4.0

Jun 30, 2018
06/18

by
Sylwia Antoniuk; Ehud Friedgut; Tomasz Łuczak

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The random triangular group $\Gamma(n,p)$ is the group given by a random group presentation with $n$ generators in which every relator of length three is present independently with probability $p$. We show that in the evolution of $\Gamma(n,p)$ the property of collapsing to the trivial group admits a very sharp threshold.

Topics: Mathematics, Combinatorics, Group Theory

Source: http://arxiv.org/abs/1403.3516

4
4.0

Jun 30, 2018
06/18

by
Nick Gill; Neil I. Gillespie; Anthony Nixon; Jason Semeraro

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To a set $\mathcal{B}$ of 4-subsets of a set $\Omega$ of size $n$ we introduce an invariant called the `hole stabilizer' which generalises a construction of Conway, Elkies and Martin of the Mathieu group $M_{12}$ based on Loyd's `15-puzzle'. It is shown that hole stabilizers may be regarded as objects inside an objective partial group (in the sense of Chermak). We classify pairs $(\Omega,\mathcal{B})$ with a trivial hole stabilizer, and determine all hole stabilizers associated to...

Topics: Mathematics, Group Theory

Source: http://arxiv.org/abs/1405.1701

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Jun 30, 2018
06/18

by
Mehrdad Kalantar; Matthew Kennedy

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For a discrete group G, we consider the minimal C*-subalgebra of $\ell^\infty(G)$ that arises as the image of a unital positive G-equivariant projection. This algebra always exists and is unique up to isomorphism. It is trivial if and only if G is amenable. We prove that, more generally, it can be identified with the algebra $C(\partial_F G)$ of continuous functions on Furstenberg's universal G-boundary $\partial_F G$. This operator-algebraic construction of the Furstenberg boundary has a...

Topics: Mathematics, Operator Algebras, Group Theory

Source: http://arxiv.org/abs/1405.4359

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27

Jun 30, 2018
06/18

by
Camille Horbez

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We show that the horoboundary of outer space for the Lipschitz metric is a quotient of Culler and Morgan's classical boundary, two trees being identified whenever their translation length functions are homothetic in restriction to the set of primitive elements of $F_N$. We identify the set of Busemann points with the set of trees with dense orbits. We also investigate a few properties of the horoboundary of outer space for the backward Lipschitz metric, and show in particular that it is...

Topics: Geometric Topology, Mathematics, Probability, Group Theory

Source: http://arxiv.org/abs/1407.3608

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31

Jun 30, 2018
06/18

by
Robert A. Kucharczyk

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We prove a rigidity theorem for semi-arithmetic Fuchsian groups: If $\Gamma_1$, $\Gamma_2$ are two semi-arithmetic lattices in $\mathrm{PSL}(2,\mathbb{R})$ virtually admitting modular embeddings and $f\colon\Gamma_1\to\Gamma_2$ is a group isomorphism that respects the notion of congruence subgroups, then $f$ is induced by an inner automorphism of $\mathrm{PGL}(2,\mathbb{R})$.

Topics: Geometric Topology, Mathematics, Number Theory, Group Theory

Source: http://arxiv.org/abs/1408.3024

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7.0

Jun 26, 2018
06/18

by
Joy Morris

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A finite group $G$ is a DCI-group if, whenever $S$ and $S'$ are subsets of $G$ with the Cayley graphs Cay$(G,S)$ and Cay$(G,S')$ isomorphic, there exists an automorphism $\varphi$ of $G$ with $\varphi(S)=S'$. It is a CI-group if this condition holds under the restricted assumption that $S=S^{-1}$. We extend these definitions to infinite groups, and make two closely-related definitions: an infinite group is a strongly (D)CI$_f$-group if the same condition holds under the restricted assumption...

Topics: Mathematics, Combinatorics, Group Theory

Source: http://arxiv.org/abs/1502.06114

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9.0

Jun 27, 2018
06/18

by
Nathan Barker; Andrew J. Duncan; David M. Robertson

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An introduction to the universal algebra approach to Higman-Thompson groups (including Thompson's group $V$) is given, following a series of lectures by Graham Higman in 1973. In these talks, Higman outlined an algorithm for the conjugacy problem; which although essentially correct fails in certain cases, as we show here. A revised and complete version of the algorithm is written out explicitly. From this, we construct an algorithm for the power conjugacy problem in these groups. Python...

Topics: Group Theory, Mathematics

Source: http://arxiv.org/abs/1503.01032

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9.0

Jun 27, 2018
06/18

by
Anne Lonjou

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Using a theorem of Dahmani, Guirardel and Osin we prove that the Cremona group in 2 dimension is not simple, over any field. More precisely, we show that some elements of this group satisfy a weakened WPD property which is equivalent in our particular context to the Bestvina and Fujiwara's one.

Topics: Group Theory, Algebraic Geometry, Mathematics

Source: http://arxiv.org/abs/1503.03731

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Jun 27, 2018
06/18

by
Akinary Hoshi; Ming-chang Kang; Aiichi Yamasaki

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Let D_n be the dihedral group of order 2n where n \ge 2, 1 \to R \to F \to D_n \to 1 be a free presentation of D_n. R^{ab}:=R/[R,R] becomes a \bm{Z}[D_n]-lattice. We will study the module structure and the rationality problem of R^{ab}.

Topics: Group Theory, Algebraic Geometry, Mathematics, Number Theory

Source: http://arxiv.org/abs/1503.04543

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6.0

Jun 27, 2018
06/18

by
Alexandre Borovik; Adrien Deloro

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We classify irreducible actions of connected groups of finite Morley rank on abelian groups of Morley rank 3.

Topics: Group Theory, Logic, Mathematics

Source: http://arxiv.org/abs/1504.00167

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10.0

Jun 27, 2018
06/18

by
Ashot Minasyan; Pavel Zalesskii

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We prove that any word hyperbolic group which is virtually compact special (in the sense of Haglund and Wise) is conjugacy separable. As a consequence we deduce that all word hyperbolic Coxeter groups and many classical small cancellation groups are conjugacy separable. To get the main result we establish a new criterion for showing that elements of prime order are conjugacy distinguished. This criterion is of independent interest; its proof is based on a combination of discrete and profinite...

Topics: Group Theory, Mathematics

Source: http://arxiv.org/abs/1504.00613

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6.0

Jun 27, 2018
06/18

by
Laura Ciobanu; Alexander Kolpakov

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In this paper we exhibit two infinite families of trees $\{T^1_n\}_{n \geq 17}$ and $\{T^2_n\}_{n \geq 17}$ on $n$ vertices, such that $T^1_n$ and $T^2_n$ are non-isomorphic, co-spectral, and the right-angled Coxeter groups (RACGs) based on $T^1_n$ and $T^2_n$ have the same geodesic growth with respect to the standard generating set. We then show that the spectrum of a tree does is not sufficient to determine the geodesic growth of the RACG based on that tree, by providing two infinite families...

Topics: Group Theory, Combinatorics, Mathematics

Source: http://arxiv.org/abs/1504.02774

10
10.0

Jun 27, 2018
06/18

by
Luis Ribes; Pavel Zalesskii

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Let ${\cal C}$ be a nonempty class of finite groups closed under taking subgroups, homomorphic images and extensions. A subgroup $H$ of an abstract residually ${\cal C}$ group $R$ is said to be conjugacy ${\cal C}$-distinguished if whenever $y\in R$, then $y$ has a conjugate in $H$ if and only if the same holds for the images of $y$ and $H$ in every quotient group $R/N\in {\cal C}$ of $R$. We prove that in a group having a normal free subgroup $\Phi$ such that $R/\Phi$ is in ${\cal C}$, every...

Topics: Group Theory, Mathematics

Source: http://arxiv.org/abs/1504.02982

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8.0

Jun 28, 2018
06/18

by
George Tomanov

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A generalization of the Auslander conjecture is proved in the case when the Levi factor of the Zariski closure of the acting group is a product of simple real algebraic groups of rank \leq 1. Also, the Auslander conjecture is proved for dimensions \leq 5.

Topics: Group Theory, Mathematics

Source: http://arxiv.org/abs/1507.08179