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Mostrando ítems 41-50 de 118
Artículo
A geometrical coefficient implying the fixed point property and stability results
(University of Houston, 1996)
In this paper we define a new geometric constant M(X) in Banach spaces such that X has the fixed point property for nonexpansive mappings if M(X) > 1. We prove that M(X) •_ WCS(X), the inequality being strict in many ...
Artículo
Nonequilibrium entropy of a gas
(American Physical Society, 1992)
The Boltzmann entropy of a dilute gas under uniform shear flow is analyzed. The entropy variation associated with viscous heating is evaluated and compared with the local equilibrium expression. For interaction potentials ...
Artículo
Localización neuroeléctrica de procesos cognitivos
(Universitat de Barcelona/Elsevier, 1992)
Recording techniques of electrical cerebral activity with surface electrodes are shown and supported as a valid choice of a physiological study of the cognitive function of the human brain. Likewise, we describe the ...
Artículo
A Birkhoff theorem for Riemann surfaces
(Rocky Mountain Mathematics Consortium, 1998)
A classical theorem of Birkhoff asserts that there exists an entire function f such that the sequence of function {/(z + n)}n≥o is dense in the space of entire functions. In this paper we give sufficient conditions on a ...
Artículo
Remarks on multivalued nonexpansive mappings
(Soochow University, 1995-01)
Convergence of fixed point sets of multivalued nonexpansive mappings is studied under both the Mosco and Hausdorff senses. A characterization for *- nonexpansive multivalued mappings is given. Also a counterexample is ...
Artículo
Aging in the one-dimensional Ising model with Glauber dynamics
(IOP Publishing Ltd., 1997-10-01)
We study the zero-temperature limit of the one-dimensional Ising model with nearest-neighbor interactions and Glauber dynamics. An exact evolution equation is derived for the spin-spin two-time correlation functions following ...
Artículo
Multiplicity and oscillations in a model for catalyzed oxidation of carbon monoxide
(American Institute of Physics Publising LLC, 1994)
We extend a model proposed for explaining multiplicity and oscillations of concentrations and temperature in catalyzed oxidation of carbon monoxide; the importance of the dimension of the system and the closure approximation ...
Artículo
NADP(+)-isocitrate dehydrogenase from the cyanobacterium Anabaena sp. strain PCC 7120: purification and characterization of the enzyme and cloning, sequencing, and disruption of the icd gene
(American Society for Microbiology, 1994)
NADP(+)-isocitrate dehydrogenase (NADP(+)-IDH) from the dinitrogen-fixing filamentous cyanobacterium Anabaena sp. strain PCC 7120 was purified to homogeneity. The native enzyme is composed of two identical subunits (M(r), ...
Artículo
A refinement of the concept of equilibrium in multiple objective continuous games
(Real Academia de Ciencias Exactas, Físicas y Naturales, 1999)
This paper considers a perfection refinement of the concept of equihbrium for multiple objective non-zero sum games. Based on the ideas of van Damme (1991) on perturbed games and stability the concept of perfect equilibrium ...
Artículo
Purely dynamical signature of the orientational glass transition
(American Physical Society, 1999-10-04)
The dynamics of the freezing transition of the rotator phase crystal of ethanol into its orientational glass phase is monitored by measurements of molecular rotational components in the quasielastic neutron scattering ...