Buscar
Mostrando ítems 41-50 de 18617
Multi-Lagrangians, hereditary operators and Lax pairs for the Korteweg - De Vries positive and negative hierarchies
(2003)
We present an approach to the construction of action principles (the inverse problem of the calculus of variations), for first order (in time derivatives) differential equations, and generalize it to field theory in order ...
Geometry of positive operators and uhlmann's approach to the geometric phase
(Pergamon-Elsevier Science Ltd, 2001-04)
In Uhlmann's description of the differential geometry of the space Ω of density operators, a relevant role is played by the parallel condition w*w =w*w, where w is a lifting of acurve y in Ω, i.e. w(t)o(t)* = y(t) for all ...
Green supply chain management and firms' performance: Understanding potential relationships and the role of green sourcing and some other green practices
(2015-11-01)
This study examines how the adoption of green supply chain management (GSCM) practices, including green sources, affects environmental and operational performance indicators. A multiple-case study was conducted using large ...
Existence of a positive solution to a semilinear equation involving pucci's operator in a convex domain
(2004)
In this article we prove existence of positive solutions for the nonlinear elliptic equation ℳ λ,Λ + (D 2 u)-γu+f(u)=0inΩ,u=0on∂Ω, where ℳ λ,Λ + denote Pucci’s extremal operator with parameters 0<λ≤Λ and Ω is convex smooth ...
Norm inequalities related to p-Schatten class
(Elsevier Science Inc, 2016-06)
In this paper, we obtain some refinements of the known operator inequalities for the p-Schatten class. In addition, we obtain an approach to the inequalities conjectured by Audenaert and Kittaneh for the p-Schatten class.
Non positively curved metric in the space of positive definite infinite matrices
(Unión Matemática Argentina, 2007-12)
We introduce a Riemannian metric with non positive curvature in the (infinite dimensional) manifold Σ∞ of positive invertible operators of a Hilbert space H, which are scalar perturbations of Hilbert-Schmidt operators. The ...
Generalized Hamacher aggregation operators for intuitionistic uncertain linguistic sets: Multiple attribute group decision making methods
(MDPI AG, 2019)
In this paper, we consider multiple attribute group decision making (MAGDM) problems in which the attribute values take the form of intuitionistic uncertain linguistic variables. Based on Hamacher operations, we developed ...