Results 41 to 50 of about 247,997 (332)

Hermitian solution to constraint system of generalized Sylvester quaternion matrix equations

open access: yesArabian Journal of Mathematics
The different systems of Sylvester quaternion matrix equations have prolific functions in system and control. This paper considers a Hermitian solution of a system of Sylvester quaternion matrix equations over a quaternion algebra H\documentclass[12pt ...
Abdur Rehman, Ivan Kyrchei
semanticscholar   +1 more source

Convergence of block iterative methods for linear systems arising in the numerical solution of Euler equations

open access: yes, 1991
Elsner L, Mehrmann V. Convergence of block iterative methods for linear systems arising in the numerical solution of Euler equations. Numerische Mathematik.
Mehrmann, Volker, Elsner, Ludwig
core   +1 more source

On tau functions for orthogonal polynomials and matrix models. [PDF]

open access: yes, 2010
Let v be a real polynomial of even degree, and let \rho be the equilibrium probability measure for v with support S; to that v(x) greeater than or equal to \int 2log |x-y| \rho (dy) +C for some constant C with equality on S.
Gordon Blower, Blower, Gordon
core   +1 more source

ON ONE NONLINEAR INTEGRABLE MODEL OF WAVE INTERACTION

open access: yesИзвестия высших учебных заведений. Поволжский регион: Физико-математические науки, 2020
Background. In this work, the functional method is applied to a first-order matrix system and the corresponding equations of wave dynamics are derived.
V. M. Zhuravlev
doaj   +1 more source

Non-stochastic matrix Schrödinger equation for open systems [PDF]

open access: yesThe Journal of Chemical Physics, 2014
We propose an extension of the Schrödinger equation for a quantum system interacting with environment. This extension describes dynamics of a collection of auxiliary wavefunctions organized as a matrix m, from which the system density matrix can be reconstructed as \documentclass[12pt]{minimal}\begin{document}$\hat{\rho }= {\bm m} {\bm m}^\dagger$\end ...
Loïc Joubert-Doriol   +2 more
openaire   +3 more sources

Solution of Positive Periodic Discrete Lyapunov Equations with Applications to the Balancing of Periodic Systems.

open access: yes, 1997
The discrete-time positive periodic Lyapunov equations have important applications in the balancing and potentially also in the model reduction of discrete-time periodic systems.
A. Varga, Varga, A., Andreas Varga
core   +1 more source

Darboux transformation with dihedral reduction group [PDF]

open access: yes, 2014
We construct the Darboux transformation with Dihedral reduction group for the 2-dimensional generalisation of the periodic Volterra lattice. The resulting Bäcklund transformation can be viewed as a nonevolutionary integrable differential difference ...
Papamikos, Georgios   +6 more
core   +1 more source

Algorithm for Calculating Statically Indeterminate Trusses Using the Force Method

open access: yesStructural Mechanics of Engineering Constructions and Buildings
The study focuses on developing an algorithm for calculating statically indeterminate trusses using the force method. The main challenge in algorithmizing the force method lies in obtaining the solution to the homogeneous equilibrium equations, which is ...
Vladimir V. Lalin, Timur R. Ibragimov
doaj   +1 more source

Tau acetylation at K331 has limited impact on tau pathology in vivo

open access: yesFEBS Letters, EarlyView.
We mapped tau post‐translational modifications in humanized MAPT knock‐in mice and in amyloid‐bearing double knock‐in mice. Acetylation within the repeat domain, particularly around K331, showed modest increases under amyloid pathology. To test functional relevance, we generated MAPTK331Q knock‐in mice.
Shoko Hashimoto   +3 more
wiley   +1 more source

Epigenetic blind spots – the role of DNA methylation dynamics in stem cell‐based models of embryogenesis

open access: yesFEBS Letters, EarlyView.
Embryo‐like structures (stembryos) are an innovative tool, but they are hindered by experimental variability and limited developmental potential. DNA methylation is crucial for mammalian development, but its status in stembryo models is poorly characterized.
Sara Canil   +4 more
wiley   +1 more source

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