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Dirichlet-Neumann and Neumann-Neumann Waveform Relaxation for the Wave Equation [article]

Martin J. Gander, Felix Kwok, Bankim C. Mandal
2014 arXiv   pre-print
We present a Waveform Relaxation (WR) version of the Dirichlet-Neumann and Neumann-Neumann algorithms for the wave equation in space time.  ...  More recently, we studied the WR extension of the Dirichlet-Neumann and Neumann-Neumann methods for parabolic problems [6, 12, 10] .  ...  We proved for the heat equation that on finite time intervals, the Dirichlet-Neumann Waveform Relaxation (DNWR) and the Neumann-Neumann Waveform Relaxation (NNWR) methods converge superlinearly for an  ... 
arXiv:1402.4285v2 fatcat:r3vc273iebf2hmq6rynutbq2uy

Dirichlet-Neumann and Neumann-Neumann Waveform Relaxation Algorithms for Parabolic Problems [article]

Martin J. Gander, Felix Kwok, Bankim C. Mandal
2014 arXiv   pre-print
We present a waveform relaxation version of the Dirichlet-Neumann and Neumann-Neumann methods for parabolic problems.  ...  For the Neumann-Neumann method, one step of the method consists of solving the subdomain problems using Dirichlet interface conditions, followed by a correction step involving Neumann interface conditions  ...  We introduce and analyze new types of Waveform Relaxation (WR) methods based on the Dirichlet-Neumann and Neumann-Neumann algorithms for steady problems.  ... 
arXiv:1311.2709v2 fatcat:4olb4zeeyncspl4cpzt4bpcn5u

Dirichlet-Neumann and Neumann-Neumann Waveform Relaxation for the Wave Equation [chapter]

Martin J. Gander, Felix Kwok, Bankim C. Mandal
2016 Lecture Notes in Computational Science and Engineering  
More recently, we studied the WR extension of the Dirichlet-Neumann and Neumann-Neumann methods for parabolic problems [6, 12, 10] .  ...  The Dirichlet-Neumann algorithm for elliptic problems was first considered by Bjørstad & Widlund [2] ; the Neumann-Neumann algorithm was introduced by Bourgat et al. [3] .  ... 
doi:10.1007/978-3-319-18827-0_51 fatcat:fbscseryxbamdksqscfct4i6mi

Verschiebebahnhofe der Erinnerung. Zum Werk W.G. Sebalds. Herausgegeben von Ingo Wintermeyer und Sigurd Martin. Wurzburg: Konigshausen & Neumann, 2007. 185 Seiten. 29,80

S. Horstkotte
2008 Monatshefte  
Herausgegeben von Ingo Wintermeyer und Sigurd Martin. Wiirzbure: Kénieshausen & Neumann, 2007. 185 Seiten. €29,80 Sechs Jahre nach seinem Unfalltod gehért W.G.  ...  In ihrem Vorwort (7—10) beziehen sich die Herausgeber Sigurd Martin und Ingo Wintermeyer auf die gedichtnispolitische Theorie der Erinnerungsorte bzw.  ... 
doi:10.1353/mon.0.0036 fatcat:lvbue6wevzd7fnbkznrybuk7ty

On the geometry of von Neumann algebra preduals [article]

Miguel Martin, Yoshimichi Ueda
2013 arXiv   pre-print
particular, the dual von Neumann algebra of such ultraproduct is diffuse.  ...  An approximate result valid for all diffuse von Neumann algebras allows to show that the equation has solution for every element in the ultraproduct of preduals of diffuse von Neumann algebras and, in  ...  Now, let us first recall that M is a von Neumann algebra [4, 16] .  ... 
arXiv:1209.3391v3 fatcat:wgxwzvonhzfjhlwkmwxllptv6u

Algebro-geometric aspects of superintegrability: the degenerate Neumann system [article]

Martin Vuk
2014 arXiv   pre-print
We study degenerate Neumann system with potential matrix that has some eigenvalues of multiplicity greater than one.  ...  Using our results we reproduce already known facts that the degenerate Neumann system is superintegrable, if its potencial matrix has eigenvalues of multiplicity greater or equal than 3.  ...  Degenerate Neumann system The Neumann system is a Hamiltonian system on the cotangent bundle of the sphere T * S n with the standard symplectic form.  ... 
arXiv:1312.5459v2 fatcat:upsmsttfa5csvd4mnl64z5huze

Star Order and Topologies on von Neumann Algebras

Martin Bohata
2018 Mediterranean Journal of Mathematics  
The goal of the paper is to study a topology generated by the star order on von Neumann algebras.  ...  On the other hand, we show that it is comparable with the norm topology if and only if the von Neumann algebra is finite-dimensional.  ...  Theorem 3. 5 . 5 Let M be a von Neumann algebra. Lemma 4. 1 . 1 Let x and y be an elements of von Neumann algebra M. If x y, then x ≤ y .  ... 
doi:10.1007/s00009-018-1221-x fatcat:swzclukarzggjcnfr5h4g7myci

Enhanced balancing Neumann-Neumann preconditioning in computational fluid and solid mechanics

Santiago Badia, Alberto F. Martín, Javier Príncipe
2013 International Journal for Numerical Methods in Engineering  
In this work, we propose an enhanced implementation of balancing Neumann-Neumann (BNN) preconditioning together with a detailed numerical comparison against the balancing domain decomposition by constraints  ...  Martín was also partially funded by the UPC postdoctoral grants under the programme "BKC-Atracció i Fidelització de talent al BKC".  ...  The best suited "local" DD preconditioner is the so-called Neumann-Neumann (NN) preconditioner, since it does not require a coloring technique.  ... 
doi:10.1002/nme.4541 fatcat:qffkvi6rxbhsxbikj43ryq4jnm

Classifying sex with MRI [article]

Matthis Ebel, Martin Lotze, Martin Domin, Nicola Neumann, Mario Stanke
2022 medRxiv   pre-print
We trained BraiNN on the remaining 3208 SHIP images and let it classify the same 100 images as Martin Lotze. BraiNN was only shown preprocessed images as before.  ...  Human expert classification We challenged an experienced MRI-researcher and neurologist (author Martin Lotze) to compete against BraiNN in classifying the sex based on a subset of MRI scans.  ... 
doi:10.1101/2022.04.27.22274355 fatcat:si3dxbustjahfppy7hwzgklvne

Algebraic integrability of the confluent Neumann system

Martin Vuk
2008 Journal of Physics A: Mathematical and Theoretical  
In this paper we study the Neumann system, which describes the harmonic oscillator (of arbitrary dimension) constrained to the sphere.  ...  We will prove complete algebraic integrability of confluent Neumann system and show that its flow can be linearized on the generalized Jacobian torus of some singular algebraic curve.  ...  The integrability of the confluent Neumann system is a consequence of the integrability of the generic Neumann system, which is well known [1, 22] .  ... 
doi:10.1088/1751-8113/41/39/395201 fatcat:b65f656fyvgjnnurhe5l24ptga

The Von Neumann/Morgenstern Approach to Ambiguity

Martin Dumav, Maxwell B. Stinchcombe
2013 Social Science Research Network  
A preference ordering, , on ∆(X) is a complete transitive binary relation on ∆(X). von Neumann and Morgenstern (vNM) [56] gave a short axiomatic foundation for preferences over distributions on X.  ...  modeling of risky decisions, there are two main approaches: preferences over mappings from a state space to consequences, as in Savage [46] ; or preferences over distributions over consequences, as in von Neumann  ... 
doi:10.2139/ssrn.2289985 fatcat:32kzdhifxze5jdenggh6mzpm5y

On the limit Sobolev regularity for Dirichlet and Neumann problems on Lipschitz domains [article]

Martin Costabel
2017 arXiv   pre-print
We construct a bounded C^1 domain Ω in R^n for which the H^3/2 regularity for the Dirichlet and Neumann problems for the Laplacian cannot be improved, that is, there exists f in C^∞(Ω) such that the solution  ...  Comprehensive regularity results in the H s,p spaces for the Dirichlet and Neumann problems on Lipschitz domains were given by Jerison and Kenig [8, 7] .  ...  (i) There exists g ∈ C ∞ (ω) such that any solution v N ∈ H 1 (ω) of the Neumann problem ∆v N = g in ω ; ∂ n v N = 0 on ∂ω does not belong to W 1+ 1 p +ε,p (ω) for any ε > 0, p ≥ 1. Proof.  ... 
arXiv:1711.07179v1 fatcat:6eclaya35vdghctxcwulma3lxq

On the geometry of von Neumann algebra preduals

Miguel Martín, Yoshimichi Ueda
2013 Positivity (Dordrecht)  
particular, the dual von Neumann algebra of such ultraproduct is diffuse.  ...  An approximate result valid for all diffuse von Neumann algebras allows to show that the equation has solution for every element in the ultraproduct of preduals of diffuse von Neumann algebras and, in  ...  Corollary 3 . 2 . 32 Let M be a von Neumann algebra.  ... 
doi:10.1007/s11117-013-0259-z fatcat:zbfhswgarbh2jhxndj2dmwapxi

On the nonlinear Dirichlet-Neumann method and preconditioner for Newton's method [article]

Faycal Chaouqui, Martin J. Gander, Pratik M. Kumbhar, Tommaso Vanzan
2022 arXiv   pre-print
The Dirichlet-Neumann (DN) method has been extensively studied for linear partial differential equations, while little attention has been devoted to the nonlinear case.  ...  (DtN ) and Neumann-to-Dirichlet operators (NtD ) are defined as DtN ( , ) := N , and NtD ( , ) := | Γ , with ), then it must have continuous Dirichlet trace and Neumann flux along the interface Γ.  ...  For the well-posedness of the Dirichlet-Neumann method, we further assume that N defines a bounded linear functional over X.  ... 
arXiv:2103.12203v3 fatcat:33hhtixvsbhjxfbntzfg35bh2m

Exportación y las Finanzas en el Crecimiento Económico de la Región San Martín : 2005-2014

oscar Jaramillo López
2018 Neumann Business Review  
Con la finalidad de dar un sustento teórico a nuestro estudio, a continuación REVISIÓN BIBLIOGRÁFICA cv Escuela de Postgrado Neumann Business School pasamos a exponer, de manera sucinta, algunas  ...  económico con una tasa promedio anual (6.8%) superior a la del promedio nacional (6.0%); de otro lado, debido al dinamismo de su economía así como al éxito de la lucha contra el cultivoEscuela de Postgrado Neumann  ... 
doi:10.22451/3002.nbr2018.vol4.1.10021 fatcat:6q2lo6f5hzhb3n7ylatastehka
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