Buscar
Mostrando ítems 31-40 de 197
Artículo
On Pták's generalization of Hankel operators
(Springer, 2001)
In 1997 Pták defined generalized Hankel operators as follows: Given two contractions T1 ∈ B(H1) and T2 ∈ B(H2), an operator X: H1 → H2 is said to be a generalized Hankel operator if T2X = XT ∗ 1 and X satisfies a ...
Artículo
Postprocessing finite-element methods for the Navier–Stokes Equations: the Fully discrete case
(Society for Industrial and Applied Mathematics, 2008)
An accuracy-enhancing postprocessing technique for finite-element discretizations of the Navier–Stokes equations is analyzed. The technique had been previously analyzed only for semidiscretizations, and fully discrete ...
Artículo
A note on the Köthe dual of Banach-valued echelon spaces
(Universitat de Barcelona. Promociones y Publicaciones Universitarias, PPU, 1988)
Several different ways of defining the Köthe dual of echelon spaces of Banach-valued functions are shown to be equivalent
Artículo
Cooperative Games and Coalition Cohesion Indices: The Choquet–Owen Value
(Institute of Electrical and Electronics Engineers, 2016-04)
In a cooperative game with transferable utility, it is usually assumed that all coalitions are equally feasible. However, if we deal with cooperative games with coalition configuration, only some coalitions are a priori ...
Artículo
in λ-sums of normed spaces
(Guy Hirsch, 1989)
Let E n , n=1,2,··. be a sequence of normed spaces and λ an AK-Köthe sequence space. The λ-sum of the spaces E n is defined by λ{E n }:={(x n ) n : x n is in E n and (|x n |) n ∈λ}. Starting from the topology in λ, λ{E n ...
Artículo
Uniform upper bound for the number of limit cycles of planar piecewise linear differential systems with two zones separated by a straight line
(Elsevier, 2023-03)
The existence of a uniform upper bound for the maximum number of limit cycles of planar piecewise linear differential systems with two zones separated by a straight line has been subject of interest of hundreds of papers. ...
Artículo
The cg-position value for games on fuzzy communication structures
(Elsevier, 2018-06)
A cooperative game for a set of agents establishes a fair allocation of the profit obtained for their cooperation. The best known of these allocations is the Shapley value. A communication structure defines the feasible ...
Artículo
Analysis of an age-structured predator-prey model with disease in the prey
(Elsevier, 2006-09)
We study a nonlinear predator-prey model in which the prey population is affected by a mild disease, but has an effect on the death-rate and is assumed to have age structure. We assume that the predator population grows ...
Artículo
A Succinct Characterization of Period Annuli in Planar Piecewise Linear Differential Systems with a Straight Line of Nonsmoothness
(Springer, 2023-07)
We close the problem of the existence of crossing period annuli in planar piecewise linear differential systems with a straight line of nonsmoothness. In fact, a characterization for the existence of such objects is provided ...
Artículo
Preface: SING 14 [Editorial]
(Springer, 2021)