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The superrigidity theorem of Margulis, see Zimmer [17], classifies finite dimen-sional representations of lattices in semi-simple Lie groups of real rank strictly larger than 1. It is a fundamental ...
Amenable, transitive and faithful actions of groups acting on trees     Amenable  transitive  faithful actions  groups  trees       font style='font-size:12px;'> 2012/3/1
We study under which condition an amalgamated free product or an HNN-extension over a finite subgroup admits an amenable, transitive and faithful action on an infinite countable set. We show that such...
Abstract: We show that if G is a group of automorphisms of a thick finite generalised quadrangle Q acting primitively on both the points and lines of Q, then G is almost simple. Moreover, if G is also...
Groups acting simply transitively on hyperbolic buildings     Groups  hyperbolic buildings  Group Theory       font style='font-size:12px;'> 2011/9/14
Abstract: We construct and classify all groups acting simply transitively on vertices of hyperbolic triangular buildings of the smallest non-trivial thickness. We have both torsion and torsion free gr...
Abstract: We indicate a C-Fuchsian counter-example to the result with the above title announced at this http URL and prove a stronger statement.
Membership Problem in groups acting freely on Z^n-trees     Membership Problem  Group Theory       font style='font-size:12px;'> 2011/8/25
Abstract: Groups acting freely on Z^n-trees (Z^n-free groups) play a key role in the study of non-archimedean group actions. Following Stallings' ideas, we develop graph-theoretic techniques to invest...
Columns of d2 ×N matrices are shown to create different sets of N operators acting on d-dimensional Hilbert space.
We investigate anisotropic $XXZ$ Heisenberg spin-1/2 chains with control fields acting on one of the end spins, with the aim of exploring local quantum control in arrays of interacting qubits. In this...
We compare three different characterizations of the globalness of bipartite unitary operations based on different tasks, namely, delocalization power, entanglement cost for LOCC implementation, and e...
Given a group acting cellularly and cocompactly on a simply-connected 2-complex, we provide a criterion establishing that all finitely generated subgroups have quasiconvex orbits. This work generalize...
We consider actions of completely metrisable groups on simplicial trees in the context of the Bass–Serre theory. Our main result characterises continuity of the amplitude function corresponding to a g...
An Experimental Study on Wind Loads Acting on a Trimaran PCC     PCC  trimaran  wind pressure  characteristics  estimation method       font style='font-size:12px;'> 2011/9/9
In recent years, demands for car transportation by a ship have been increasing with favorable economic conditions in auto sector, and the need of a pure car carrier (PCC) has grown quickly. A PCC need...
An Experimental Study on Wind Loads Acting on a Trimaran PCC     PCC  trimaran  wind pressure  characteristics  estimation method       font style='font-size:12px;'> 2011/9/9
In recent years, demands for car transportation by a ship have been increasing with favorable economic conditions in auto sector, and the need of a pure car carrier (PCC) has grown quickly. A PCC need...
A model is proposed to investigate the forces and stresses acting on bones in a shoulder-hand system due to straining of muscles during daily physical activities. This model is proposed as a truss sys...
In this letter we derive an expression for the force acting on a small (still macroscopic) particle in the field of the quantized electromagnetic radiation in any arbitrary quantum state. This result ...

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