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Showing 1 to 20 of 53 for “"Poincare"”.
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Self improving Orlicz-Poincare inequalities
In [20], Keith and Zhong prove that spaces admitting Poincar e inequalities also admit a priori stronger Poincar e inequalities. We use their technique, with slight adjustments, to obtain a similar result in the case of Orlicz-Poincar e inequalities. We give examples in the plane that show all …
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Stabilization and classification of poincare duality embeddings
<p>We define a space E(K,X) of Poincare Duality embeddings and show that such spaces admit a highly connected stabilization map.</p> <p>This serves as a tool for classifying Poincare Duality embeddings in terms of the homotopy types of their complements. In</p> <p>particular, a Poincare embedding …
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Spin Representations of the q-Poincare Algebra
… durch irreduzible Darstellungen der Poincare-Algebra beschrieben werden. Im Rahmen der Darstellungtheorie der q-deformierten Poincaré-Algebra untersucht diese Arbeit den Spin von Teilchen auf einer nichtkommutativen Geometrie. Zunaechst wird eine Uebersicht ueber die Konstruktion der …
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Impredicativity and turn of the century foundations of mathematics : presupposition in Poincare and Russell
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Linguistics and Philosophy, 1993.
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Trajectory design in the spatial circular restricted three-body problem exploiting higher-dimensional Poincare maps
<p>In this investigation, the role of higher-dimensional Poincaré maps in facilitating trajectory design is explored for a variety of applications. To begin, existing strategies to implement Poincaré maps for trajectory design applications in the spatial CR3BP are evaluated. New applications for …
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The Extension of an Iterative Procedure of Poincare for The Solution of Problems in Classical Elastokinetics
Made available in DSpace on 2014-12-10T17:25:31Z (GMT). No. of bitstreams: 1 6503668.pdf: 2028555 bytes, checksum: c86addcb7e2856d1b0d8d106dc95be7d (MD5) Previous issue date: 1964
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Near-inertial internal Poincare waves in Lake Michigan: Seasonal variability and effects on lateral dispersion and turbulent mixing
<p>A dominant physical process in stratified Lake Michigan is near-inertial internal Poincaré waves. The near-inertial internal Poincaré waves is described as locally quasi-uniform currents in the lateral direction, with vertically-sheared structures rotating clockwise at a near-inertial period. …
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Hyperbolic graph embedding of magnetoencephalography brain networks to study brain alterations in patients with subjective cognitive decline
… derived from magnetoencephalography data to a Poincare disk instead of traditional Euclidean space. The Poincare disk is a negatively curved unit disk that encourages a continuous tree-like (and low-dimensional) embedding where paths between sibling nodes pass through a more central parent …
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Characterization of hypertension through multivariate analysis utilizing linear and nonlinear methods
… fluctuation analysis and parameter SD2 from Poincare analysis. Linear results did not aid in subject separation. Linear analyses consisted of heart rate and blood pressure variability and baroreflex response. The nonlinear analysis methods included approximate entropy (ApEn), detrended …
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A dynamical-systems approach to understanding turbulence in plane Couette flow
… of building the set of local models on a certain Poincare section. The Poincare section is associated with the constraint that the rate of kinetic energy in the flow is zero. Our research suggests that the dynamics of plane Couette flow can, in fact, be organized in terms of the system's periodic …
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Coherent states of the Poincaré group, related frames and transforms
… here families of coherent states for the full Poincare group, for representations corresponding to mass $m>0$ and arbitrary integral or half-integral spin. Each family of coherent states is defined by an affine section in the group and constitutes a frame. The sections, in their turn, are …
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Differential and Integral Invariance of the Relativistic Vlasov-Boltzmann Equation and the Associated Invariant Variational Problem
… of these equations under the action of the Poincare group. The invariant variational problem is then constructed for these equations, and is shown to yield the kinetic equations as Euler-Lagrange equations for the variational principle, as well as first integrals for the Euler-Lagrange, …
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Asymptotic analysis of the parametrically driven damped nonlinear evolution equation
… driven linear oscillator, we apply the Lindstedt-Poincare method and the multiple-scales technique to obtain the amplitude equation for the driving frequencies Wdr ~ 2ω₀,ω₀, (2/3)ω₀ and (1/2)ω₀. The Lindstedt-Poincare method is modified to cater for solutions with slowly varying amplitudes; its …
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"If it quacks like a sphere" : the million dollar problem
… Russian mathematician, may have proved the Poincare Conjecture, a statement first poised by Jules Henri Poincare in 1902. The problem is the most eminent challenge in the mathematical field of topology. Perelman posted his proof on the online informal preprint server at arXiv.org. His proof …
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Field Theoretical Models on Non-Commutative Spaces
… zu betrachten, die sowohl eine verallgemeinerte Poincare' Symmetry besitzen, als auch symmetrisch unter einer beliebigen Eichgruppe sind. Dabei legen wir der Eichtheorie die gleichen Konzepte zugrunde wie im Falle der kanonischen Raum-Zeit. Da die Strukturen vielfältiger sind, werden wir auf …
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Periodic solutions of nonlinear wave equations
… study of periodic solutions was introduced by H. Poincare in the memoire he presented on the three body problem. By looking at periodic and asymptotics solutions he discovered what today we call chaos, and showed that these special solutions were a powerful tool to resolve questions in the theory …
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Generalisations of the almost stability theorem
… of finite cohomological dimension splits over a Poincare duality subgroup. In Chapter 1 we give a brief overview of this thesis, some historical background information and also mention some recent developments in this area. Chapter 2 consists mostly of introductory material, covering group …
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On the construction of macroscopically local relativistic quantum theories
… of a higher symmetry group containing the Poincare group is discussed. It is concluded that the higher symmetry is, in fact, of little use for this interpretation. This .leads in a natural way to the problem of finding some of these ""quasilocal"" operators on the space of states of a given …
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The contact property for magnetic flows on surfaces
… existence results for a) periodic orbits, and b) Poincare sections for motions on a fixed energy level Σ_m := {E = m^2/2} ⊂ T M . We tackle this problem by studying the contact geometry of the level set Σ_m . This will allow us to a) count periodic orbits using algebraic invariants such as the …
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