Results 91 to 100 of about 22,526 (213)
Indefinite Ruhe’s Variant of the Block Lanczos Method for Solving the Systems of Linear Equations
Advances in Mathematical Physics, 2020 In this paper, we equip Cn with an indefinite scalar product with a specific Hermitian matrix, and our aim is to develop some block Krylov methods to indefinite mode.
M. Ghasemi Kamalvand, K. Niazi Asil
doaj +1 more source
An implementation of the look-ahead Lanczos algorithm for non-Hermitian matrices [PDF]
The nonsymmetric Lanczos method can be used to compute eigenvalues of large sparse non-Hermitian matrices or to solve large sparse non-Hermitian linear systems.
Freund, Roland W. +2 more
core +1 more source
Low energy and dynamical properties of a single hole in the t-Jz model
, 1995 We review in details a recently proposed technique to extract information about dynamical correlation functions of many-body hamiltonians with a few Lanczos iterations and without the limitation of finite size.
A. Parola +37 more
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, 1997 The classical formalism of the Moment Problem has been combined with a cumulant approach and applied to the extensive many-body problem. This has yielded many new exact results for many-body systems in the thermodynamic limit - for the ground state energy, for excited state gaps, and for arbitrary ground state averages.
openaire +2 more sources
Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.Abstract This study compares the vertical tilt and potential vorticity (PV) $(PV)$ structure of average and extreme extra‐tropical cyclones (ETCs) in the Northern Hemisphere during the cold season (October–March) in ERA5 reanalysis. Vertical tilt is quantified using a novel two‐component (directional and lateral, aligned with and across cyclone motion)
Daniel Köhler, Victoria A. Sinclair
wiley +1 more source
Numerical Linear Algebra with Applications, Volume 33, Issue 1, February 2026.ABSTRACT The heat equation is often used to inpaint dropped data in inpainting‐based lossy compression schemes. We propose an alternative way to numerically solve the heat equation by an extended Krylov subspace method. The method is very efficient with respect to the computation of the solution of the heat equation at large times.
Volker Grimm, Kevin Liang
wiley +1 more source
Some Hyperbolic Iterative Methods for Linear Systems
Journal of Applied Mathematics, 2020 The indefinite inner product defined by J=diagj1,…,jn, jk∈−1,+1, arises frequently in some applications, such as the theory of relativity and the research of the polarized light.
K. Niazi Asil, M. Ghasemi Kamalvand
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On Storm Tracks, Weather Regimes, and a Wave Breaking Recipe
AGU Advances, Volume 7, Issue 1, February 2026.Abstract The mid‐latitude atmospheric circulation is often described as a combination of low‐frequency variability, such as weather regimes (WRs) that can persist for weeks, and high‐frequency variability, including synoptic systems that shape our daily weather.
Talia Tamarin‐Brodsky +2 more
wiley +1 more source
1D Frustrated Ferromagnetic Model with Added Dzyaloshinskii-Moriya Interaction
, 2012 The one-dimensional (1D) isotropic frustrated ferromagnetic spin-1/2 model is considered. Classical and quantum effects of adding a Dzyaloshinskii-Moriya (DM) interaction on the ground state of the system is studied using the analytical cluster method ...
A. Gendiar +60 more
core +1 more source
Solving Nonholonomic Systems with the Tau Method
Mathematical and Computational Applications, 2019 A numerical procedure based on the spectral Tau method to solve nonholonomic systems is provided. Nonholonomic systems are characterized as systems with constraints imposed on the motion.
Alexandra Gavina +2 more
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