Results 51 to 60 of about 1,439 (151)

Improved analysis of algorithms based on supporting halfspaces and quadratic programming for the convex intersection and feasibility problems [PDF]

, 2014
This paper improves the algorithms based on supporting halfspaces and quadratic programming for convex set intersection problems in our earlier paper in several directions.
Pang, C. H. Jeffrey
core  

Interpolation and random interpolation in de Branges–Rovnyak spaces

Journal of the London Mathematical Society, Volume 112, Issue 4, October 2025.
Abstract The aim of this paper is to characterize universal and multiplier interpolating sequences for de Branges–Rovnyak spaces H(b)$\mathcal {H}(b)$ where the defining function b$b$ is a general non‐extreme rational function. Our results carry over to recently introduced higher order local Dirichlet spaces and thus generalize previously known results
Andreas Hartmann, Giuseppe Lamberti
wiley   +1 more source

Fejer-Hadamard Inequlality for Convex Functions on the Coordinates in a Rectangle from the Plane

International Journal of Analysis and Applications, 2016
We give Fejer-Hadamard inequality for convex functions on coordinates in the rectangle from the plane. We define some mappings associated to it and discuss their properties.
G. Farid, M. Marwan, Atiq Ur Rehman
doaj   +2 more sources

Fejér–Hadamard Type Inequalities for (α, h-m)-p-Convex Functions via Extended Generalized Fractional Integrals

Fractal and Fractional, 2021
Integral operators of a fractional order containing the Mittag-Leffler function are important generalizations of classical Riemann–Liouville integrals. The inequalities that are extensively studied for fractional integral operators are the Hadamard type ...
Ghulam Farid, Muhammad Yussouf, Kamsing Nonlaopon   +2 more
doaj   +1 more source

Local Whittle estimation in time‐varying long memory series

Journal of Time Series Analysis, Volume 46, Issue 4, Page 647-673, July 2025.
The memory parameter is usually assumed to be constant in traditional long memory time series. We relax this restriction by considering the memory a time‐varying function that depends on a finite number of parameters. A time‐varying Local Whittle estimator of these parameters, and hence of the memory function, is proposed.
Josu Arteche, Luis F. Martins
wiley   +1 more source

Maximal Operators Associated With Walsh‐Paley Systems on Dyadic Hardy Spaces

Mathematical Methods in the Applied Sciences, Volume 48, Issue 9, Page 9770-9777, June 2025.
ABSTRACT The concept of a critical point of the maximum operator T$$ T $$ associated with the Walsh‐Paley system is the focus of this study. Namely, a point p0∈(0,1)$$ {p}_0\in \left(0,1\right) $$ is called critical with respect to T$$ T $$, if T$$ T $$ is bounded from Hp$$ {H}_p $$ to Lp$$ {L}_p $$, for all p>p0$$ p>{p}_0 $$ and it is not bounded from
Ushangi Goginava, Nacima Memić, Farrukh Mukhamemdov   +2 more
wiley   +1 more source

Curves defined by a class of discrete operators: Approximation result and applications

Mathematical Methods in the Applied Sciences, Volume 48, Issue 2, Page 2388-2403, 30 January 2025.
In approximation theory, classical discrete operators, like generalized sampling, Szász‐Mirak'jan, Baskakov, and Bernstein operators, have been extensively studied for scalar functions. In this paper, we look at the approximation of curves by a class of discrete operators, and we exhibit graphical examples concerning several cases. The topic has useful
Rosario Corso, Gabriele Gucciardi
wiley   +1 more source

An Estimation of Different Kinds of Integral Inequalities for a Generalized Class of Godunova–Levin Convex and Preinvex Functions via Pseudo and Standard Order Relations

Journal of Function Spaces, Volume 2025, Issue 1, 2025.
The connection between generalized convexity and analytic operators is deeply rooted in functional analysis and operator theory. To put the ideas of preinvexity and convexity even closer together, we might state that preinvex functions are extensions of convex functions. Integral inequalities are developed using different types of order relations, each
Zareen A. Khan, Waqar Afzal, Nikhil Khanna   +2 more
wiley   +1 more source

Some Novel Inequalities for Godunova–Levin Preinvex Functions via Interval Set Inclusion (⊆) Relation

Journal of Mathematics, Volume 2025, Issue 1, 2025.
In this note, we introduce the concept of ℏ‐Godunova–Levin interval‐valued preinvex functions. As a result of these novel notions, we have developed several variants of Hermite–Hadamard and Fejér‐type inequalities under inclusion order relations. Furthermore, we demonstrate through suitable substitutions that this type of convexity unifies a variety of
Zareen A. Khan, Waqar Afzal, Mujahid Abbas, Kwara Nantomah, Ding-Xuan Zhou   +4 more
wiley   +1 more source

Convergences of Weighted Averaged Operators in p‐Uniformly Convex Metric Spaces

Journal of Mathematics, Volume 2025, Issue 1, 2025.
This paper presents improvements to theorems concerning the △‐convergence of iterative sequences in p‐uniformly convex metric spaces. The analysis focuses on sequences generated by weighted average operators applied to pairs of simultaneous quasi‐nonexpansive mappings.
Anawat Rodchan, Pongsakorn Yotkaew, Watcharaporn Cholamjiak   +2 more
wiley   +1 more source