Results 81 to 90 of about 4,217,963 (196)

Solving Large-Scale Unconstrained Optimization Problems with an Efficient Conjugate Gradient Class

open access: yesJournal of Mathematics
The main goal of this paper is to introduce an appropriate conjugate gradient class to solve unconstrained optimization problems. The presented class enjoys the benefits of having three free parameters, its directions are descent, and it can fulfill the ...
Sanaz Bojari, Mahmoud Paripour
doaj   +1 more source

Exact local distribution of the absolutely continuous spectral measure

open access: yesProceedings of the London Mathematical Society, Volume 132, Issue 4, April 2026.
Abstract It is well‐established that the spectral measure for one‐frequency Schrödinger operators with Diophantine frequencies exhibits optimal 1/2$1/2$‐Hölder continuity within the absolutely continuous spectrum (Avila and Jitomirskaya, Commun. Math. Phys. 301 (2011), 563–581).
Xianzhe Li, Jiangong You, Qi Zhou
wiley   +1 more source

Metoda quasi-Newton diagonală bazată pe minimizarea funcţiei Byrd-Nocedal pentru optimizare fără restricţii [PDF]

open access: yesRevista Română de Informatică și Automatică, 2018
A new quasi-Newton method with a diagonal updating matrix is suggested, where the diagonal elements are determined by minimizing the measure function of Byrd and Nocedal subject to the weak secant equation of Dennis and Wolkowicz.
Neculai ANDREI
doaj  

An observation‐driven state‐space model for claims size modelling

open access: yesCanadian Journal of Statistics, Volume 54, Issue 1, March 2026.
Abstract State‐space models are popular in econometrics. Recently, these models have gained some popularity in the actuarial literature. The best known state‐space models are of the Kalman‐filter type. These are called parameter‐driven because the observations do not impact the state‐space dynamics.
Jae Youn Ahn   +2 more
wiley   +1 more source

Reducing Impulse Noise in Images Using an Improved Formula Conjugate Gradient Method

open access: yesZanco Journal of Pure and Applied Sciences
The conjugate formula's significance is frequently emphasised by conjugate gradient approaches. In this paper, a novel conjugate coefficient for the conjugate gradient technique is introduced using a quadratic model and conjugacy condition.
Basim A. Hassan, Yousif Ali Mohammed
doaj   +1 more source

Simple 3‐Designs of PSL ( 2 , 2 n ) With Block Size 13

open access: yesJournal of Combinatorial Designs, Volume 34, Issue 3, Page 119-138, March 2026.
ABSTRACT This paper focuses on the investigation of simple 3‐( 2 n + 1 , 13 , λ ) designs admitting PSL ( 2 , 2 n ) as an automorphism group. Such designs arise from the orbits of 13‐element subsets under the action of PSL ( 2 , 2 n ) on the projective line X = GF ( 2 n ) ∪ { ∞ }, and any union of these orbits also forms a 3‐design.
Takara Kondo, Yuto Nogata
wiley   +1 more source

Report of the 1983 conjugate campaign in Iceland

open access: yesAntarctic Record, 1984
This campaign has been organized by the National Institute of Polar Research as a cooperative project with the Science Institute, University of Iceland.
Natsuo Sato   +3 more
doaj   +1 more source

A novel four-term conjugate gradient method for large-scale optimization problems involving formulation and application

open access: yesFranklin Open
The conjugate gradient (CG) method is widely employed for solving unconstrained optimization problems due to its independence from second derivatives or their approximations. It has found extensive applications in fields such as image restoration, neural
Ahmad Alhawarat   +4 more
doaj   +1 more source

Split extensions of group with infinite conjugacy classes

open access: yes, 2007
We characterize the group property of being with infinite conjugacy classes (or icc, i.e.
Preaux, Jean-Philippe
core   +3 more sources

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