135,005 research outputs found
Finding Aid: MS 547 - John L. Neumann Papers and Slide Collection
No full textThe MS 547 - John L. Neumann Papers and Slide Collection contains mostly photographic slides. These slides relate to three different events or programs, including the International Sports Program with Saudi Arabia that took place in 1976, a 1980 trip to Zacatacas, Mexico, and 1988 visit to Seoul, South Korea for a YMCA conference. The vast majority of the slides come from the International Sports Program with Saudi Arabia. The slides contain a lot of photographs taken from their time spent in Montreal during the 1976 Montreal Olympics. There are also slides from training activities, friendly matches and trips to New York, New Jersey and Cape Cod and Boston. Along with the slides is a small plaque that was given to John Neumann for his participation with this program. There is one folder of slides that were taken at the YMCA conference in Seoul, South Korea, 1988. John Neumann was a volunteer along with clinician Wendy Fox (of the YMCA of the USA) at this conference. The slides seem to be folders taken at the conference and at locations around Seoul, including facilities and/events at the 1988 Seoul Olympics. Finally there are a group of folders containing slides from a trip to Zacatacas, Mexico in 1980. John Neumann was guest lecturer and volunteer in an AAHPERD (American Association for Health, Physical Education, Recreation and Dance) sponsored health/nutrition and fitness program held there. Events held at this program, including Bull Fights, Rodeo, and visits to Aztec Ruins are represented.To learn more about John L. Neumann, see: https://springfield.as.atlas-sys.com/agents/people/9
A SURVEY ON MULTINORMED VON NEUMANN ALGEBRAS
No full textThe present paper is devoted to multinormed von Neumann algebras. We pick up basic facts on von Neumann algebras to introduce their locally convex versions. A key construction in this direction is a central topology of a von Neumann algebra. Every multinormed von Neumann algebra can be realized as a local von Neumann algebra on a certain domain in a Hilbert space. It admits the predual (unique up to an isometry), which is an l(1)-normed space. As the main result we describe multinormed L-infinity- algebras which are locally convex analogs of abelian von Neumann algebras
Álgebras de von Neumann - fatores
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas, Programa de Pós-Graduação em Matemática e Computação Científica, Florianópolis, 2011Dada uma álgebra de von Neumann M em L(H), onde L(H) é o espaço dos operadores lineares e limitados sobre um espaço de Hilbert H, dizemos que M é um fator se seu centro consiste somente por múltiplos escalares do operador identidade de L(H). Quando M é um fator, podemos classificá-lo em tipo I, II e III. Além disso, o tipo II pode ser dividido em dois sub-tipos. O objetivo dessa dissertação é exibir exemplos de fatores, bem como exemplos dos tipos I, II e seus sub-tipos
Equilibrio competitivo y soportes del crecimiento en el modelo de Von Neumann
No full textThis paper shows the existence of a reproducible competitive equilibrium in the general Von Neumann growth model, extending in this way a result due to Roemer.
Convergence of infinite products of matrices and inner-outer iteration schemes
No full textElsner L, Bru R, Neumann MM. Convergence of infinite products of matrices and inner-outer iteration schemes. Electronic Transactions on Numerical Analysis. 1994;2:183-193
Three nontrivial solutions for the p-Laplacian Neumann problems with a concave nonlinearity near the origin
No full textWe consider a nonlinear Neumann problem driven by the p-
Laplacian, with a right-hand side nonlinearity which is concave near the
origin. Using variational techniques, combined with the method of upper-lower
solutions and with Morse theory, we show that the problem has at least three
nontrivial smooth solutions, two of which have a constant sign (one positive
and one negative).FCTPOCI/MAT/55524/200
The von Neumann Model and the Early Models of General Equilibrium
No full textThe paper reconstructs the von Neumann model, comments on its salient features and critically reviews some of its generalisations. The issues related to thetreatment of consumption, decomposability and uniqueness of the rate of growth and interest will be especially scrutinised. The most prominent models of general equilibrium that appeared before or roughly at the same time as von Neumann's model will be also reviewed in the paper and compared with it. It will be demonstrated that none of them had any noticeable influence on von Neumann's model, which is genuinely distinct, ideologically free and methodologically fresh and forward-looking. It will be argued that the model can be viewed as a brilliant mathematical metaphor of some deep-rooted old vision, pertaining to the core issues of commodity production
Algebraic integrability of confluent Neumann system
No full textIn this paper we study the Neumann system, which describes the harmonic
oscillator (of arbitrary dimension) constrained to the sphere. In particular
we will consider the confluent case where two eigenvalues of the potential
coincide, which implies that the system has symmetry. We will prove
complete algebraic integrability of the confluent Neumann system and show
that its flow can be linearized on the generalized Jacobian torus of some singular
algebraic curve. The symplectic reduction of S 1 action will be described and
we will show that the general Rosochatius system is a symplectic quotient of
the confluent Neumann system, where all the eigenvalues of the potential are
double
Introducing Formalism in Economics: The Growth Model of John von Neumann
No full textThe objective is to interpret John von Neumann's growth model as a decisive step of the forthcoming formalist revolution of the 1950s in economics. This model gave rise to an impressive variety of comments about its classical or neoclassical underpinnings. We go beyond this traditional criterion and interpret rather this model as the manifestation of von Neumann's involvement in the formalist programme of mathematician David Hilbert. We discuss the impact of Kurt Gödel’s discoveries on this programme. We show that the growth model reflects the pragmatic turn of the formalist programme after Gödel and proposes the extension of modern axiomatisation to economics..Von Neumann, Growth model, Formalist revolution, Mathematical formalism, Axiomatics
The Poisson-Neumann problem and its relation to the Neumann problem
No full textWe introduce the Poisson-Neumann problem for an uniformly elliptic operator in divergence form in a bounded 1-sided Chord Arc Domain , which considers solutions to in with zero Neumann data on the boundary for and in some tent spaces. We give different characterizations of solvability of the Poisson-Neumann problem and its weaker variants, and in particular, we show that solvability of the weak Poisson-Neumann probelm is equivalent to a weak reverse Hölder inequality. We show that the Poisson-Neumman problem is closely related to the Neumann problem, whose solvability is a long-standing open problem. We are able to improve the extrapolation of the Neumann problem from Kenig and Pipher by obtaining an extrapolation result on the Poisson-Neumann problem.49 page
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