Buscar
Mostrando ítems 51-60 de 3759
BEST APPROXIMATION OF BOUNDED-FUNCTIONS BY CONTINUOUS-FUNCTIONS
(Academic Press Inc Jnl-comp SubscriptionsSan Diego, 1984)
Best approximation in vector valued function spaces
(Universidad Nacuional de Colombia; Sociedad Colombiana de matemáticas, 1985)
Let T be the unit circle, and m be the normalized Lebesgue measure on T. If H is a separable Hilbert space, we let L∞T,H) be the space of essentially bounded functions on T with values in H. Continuous functions with values ...
Best approximation by diagonal operators in Schatten ideals
(Elservier, info)
Approximating geometric knapsack via l-packings
(IEEE, 2017)
We study the two-dimensional geometricknapsack problem (2DK) in which we are given a setofnaxis-aligned rectangular items, each one with anassociated profit, and an axis-aligned square knapsack. ...
Polygonal approximation of digital planar curves through vertex betweenness
(ElsevierPhiladelphia, 2013-02)
Contour polygonal approximation is usually defined as a set of selected points, which describes a polygon and best represents the original contour. This paper presents a novel graph based approach to compute a polygonal ...
On the approximation of convex bodies by ellipses with respect to the symmetric difference metric
(2018)
Given a centrally symmetric convex body K ⊂ Rd and a positive number λ, we consider, among all ellipsoids E ⊂ Rd of volume λ, those that best approximate K with respect to the symmetric difference metric, or equivalently ...
An approximation problem in multiplicatively invariant spaces
(American Mathematical Society, 2017-07)
Let H be Hilbert space and (Ω, m) a σ-finite measure space. Multiplicatively invariant(MI) spaces are closed subspaces of L2(Ω, H) that are invariant under point-wise multiplication byfunctions from a fixed subset of L∞(Ω). ...
A characterization of minimal Hermitian matrices
(Elsevier Inc, 2012-04)
We describe properties of a Hermitian matrix M ∈ Mn(C) having minimal quotient norm in the following sense: M M + D for all real diagonal matrices D ∈ Mn(C). Here denotes the operator norm. We show a constructive method ...
A convex OPF approximation for selecting the best candidate nodes for optimal location of power sources on DC resistive networks
(Elsevier B.V., 2019)
This paper proposes a convex approximation approach for solving the optimal power flow (OPF) problem in direct current (DC) networks with constant power loads by using a sequential quadratic programming approach. A ...
Approximation by group invariant subspaces
(Gauthier-Villars/Editions Elsevier, 2020-10)
In this article we study the structure of Γ-invariant spaces of L2(S). Here S is a second countable LCA group. The invariance is with respect to the action of Γ, a non commutative group in the form of a semidirect product ...