Results 21 to 30 of about 31,755,712 (367)
On a variation of Sands′ method [PDF]
International Journal of Mathematics and Mathematical Sciences, 1986 A subset of a finite additive abelian group G is a Z‐set if for all a ∈ G, na ∈ G for all n ∈ Z. The group G is called “Z‐good” if in every factorization G = A ⊕ B, where A and B are Z‐sets at least one factor is periodic. Otherwise G is called “Z‐bad.”The purpose of this paper is to investigate factorizations of finite ablian groups which arise from a
openaire +3 more sources
Tellus: Series A, Dynamic Meteorology and Oceanography, 2016 Recently there has been a surge in interest in coupling ensemble-based data assimilation methods with variational methods (commonly referred to as 4DVar).
Daniel Hodyss +2 more
doaj +1 more source
Variational Methods for Normal Integration [PDF]
Journal of Mathematical Imaging and Vision, 2017 The need for an efficient method of integration of a dense normal field is inspired by several computer vision tasks, such as shape-from-shading, photometric stereo, deflectometry.
Yvain Quéau +2 more
semanticscholar +1 more source
Some new classes of general quasi variational inequalities
AIMS Mathematics, 2021 In this paper, we introduce and consider some new classes of general quasi variational inequalities, which provide us with unified, natural, novel and simple framework to consider a wide class of unrelated problems arising in pure and applied sciences ...
Muhammad Aslam Noor +2 more
doaj +1 more source
Modeling Variational Inpainting Methods With Splines
Frontiers in Applied Mathematics and Statistics, 2019 Mathematical methods of image inpainting often involve the discretization of a given continuous model. Typically, this is done by a pointwise discretization.
Florian Boßmann +2 more
doaj +1 more source
Variational integrators, the Newmark scheme, and dissipative systems [PDF]
, 1999 Variational methods are a class of symplectic-momentum integrators for ODEs. Using these schemes, it is shown that the classical Newmark algorithm is structure preserving in a non-obvious way, thus explaining the observed numerical behavior ...
Kane, C. +3 more
core +2 more sources
Variational Methods for Atoms and the Virial Theorem
Atoms, 2022 In the case of the one-electron Dirac equation with a point nucleus, the virial theorem (VT) states that the ratio of the kinetic energy to potential energy is exactly −1, a ratio that can be an independent test of the accuracy of a computed solution ...
Charlotte Froese Fischer +1 more
doaj +1 more source
Hardware-efficient variational quantum eigensolver for small molecules and quantum magnets [PDF]
Nature, 2017 Quantum computers can be used to address electronic-structure problems and problems in materials science and condensed matter physics that can be formulated as interacting fermionic problems, problems which stretch the limits of existing high-performance
A. Kandala +6 more
semanticscholar +1 more source
Off-The-Grid Variational Sparse Spike Recovery: Methods and Algorithms
Journal of Imaging, 2021 Gridless sparse spike reconstruction is a rather new research field with significant results for the super-resolution problem, where we want to retrieve fine-scale details from a noisy and filtered acquisition.
Bastien Laville +2 more
doaj +1 more source
Benchmark Test Calculation of a Four-Nucleon Bound State [PDF]
, 2001 In the past, several efficient methods have been developed to solve the Schroedinger equation for four-nucleon bound states accurately. These are the Faddeev-Yakubovsky, the coupled-rearrangement-channel Gaussian-basis variational, the stochastic ...
A. Kievsky +83 more
core +3 more sources