Results 131 to 140 of about 13,417,881 (325)
X‐Ray Absorption Studies of Local Structure of Dilute Ionic Species in Molten Salts
Chemistry–Methods, EarlyView.This article reviews the state of the art in the use of X‐ray absorption spectroscopy methods, both experimental and theoretical, for understanding the structure of dopant metal ions in molten salts. Recent strategies, including molecular dynamics simulations and neural network–assisted analysis of X‐ ray absorption spectroscopy as well as chemometrics
Kaifeng Zheng +11 more
wiley +1 more source
Divisibility Relations for the Dimensions and Hilbert series of Nichols Algebras of Non-Abelian Group Type [PDF]
arXiv, 2012 We present a divisibility relation for the dimensions and Hilbert series of certain classes of Nichols algebras of non-abelian group type, which generalizes Nichols algebras over Coxeter groups with constant cocycle -1. For this we introduce three groups of isomorphisms acting on Nichols algebras, which generalize the exchange operator introduced by ...
arxiv
Simple algebras and cohomology groups of arbitrary fields [PDF]
, 1959 S. A. Amitsur
openalex +1 more source
Chemistry–Methods, EarlyView.This work explores data acquisition and reduction protocols for atomic pair distribution scheme that enhances high‐angle data collection, and the effects of instrumental parameters on resulting pair distribution functions are examined. A correction for sample absorption in PDFgetX3 is introduced. Herein, data acquisition protocols are explored and data
Till Schertenleib +5 more
wiley +1 more source
The derivation algebra and automorphism group of the twisted Schrödinger-Virasoro algebra [PDF]
arXiv, 2008 In this article, we determine the derivation algebra and the automorphism group of the twisted Schr\"{o}dinger-Virasoro algebra.
arxiv
Operations with respect to which the elements of a Boolean algebra form a group [PDF]
, 1924 B. A. Bernstein
openalex +1 more source
Analysis of density matrix embedding theory around the non‐interacting limit
Communications on Pure and Applied Mathematics, EarlyView.Abstract This article provides the first mathematical analysis of the Density Matrix Embedding Theory (DMET) method. We prove that, under certain assumptions, (i) the exact ground‐state density matrix is a fixed‐point of the DMET map for non‐interacting systems, (ii) there exists a unique physical solution in the weakly‐interacting regime, and (iii ...
Eric Cancès +4 more
wiley +1 more source
Infinite volume and atoms at the bottom of the spectrum
Comptes Rendus. MathématiqueLet $G$ be a higher rank simple real algebraic group, or more generally, any semisimple real algebraic group with no rank one factors and $X$ the associated Riemannian symmetric space. For any Zariski dense discrete subgroup $\Gamma
Edwards, Sam +3 more
doaj +1 more source
Some geometric aspects of finite abelian groups [PDF]
Rendiconti di Matematica e delle Sue Applicazioni, 2006 Let Π be a finite projective plane admitting a large abelian collineation group. It is well known that this situation may be studied by algebraic means (via a representation by suitable types of difference sets), namely using group rings and algebraic ...
Dina Ghinelli, Dieter Jungnickel
doaj
Solving Nonlinear Differential Algebraic Equations by an Implicit Lie-Group Method
Journal of Applied Mathematics, 2013 We derive an implicit Lie-group algorithm together with the Newton iterative scheme to solve nonlinear differential algebraic equations. Four numerical examples are given to evaluate the efficiency and accuracy of the new method when comparing the ...
Chein-Shan Liu
doaj +1 more source