Results 111 to 120 of about 81,140 (282)
Unbiased calculation, evaluation, and calibration of ensemble forecast anomalies
Quarterly Journal of the Royal Meteorological Society, EarlyView.Standard methods for calculating ensemble forecast anomalies result in statistical inconsistencies between forecast and verification anomalies, even if the underlying forecasts are perfectly reliable. An unbiased evaluation of anomaly‐based ensemble forecasts must account for differences in climatological sampling uncertainty between forecasts and ...
Christopher D. Roberts +1 more
wiley +1 more source
On Hopf algebras with triangular decomposition
, 2018 In this survey, we first review some known results on the representation theory of algebras with triangular decomposition, including the classification of the simple modules. We then discuss a recipe to construct Hopf algebras with triangular decomposition.
openaire +4 more sources
On Jordan centralizers of triangular algebras [PDF]
Banach Journal of Mathematical Analysis, 2016 Let A be a unital algebra over a number field F. A linear mapping ϕ from A into itself is called a Jordan-centralized mapping at a given point G∈A if ϕ(AB+BA)=ϕ(A)B+ϕ(B)A=Aϕ(B)+Bϕ(A) for all A, B∈A with AB=G. In this paper, it is proved that each Jordan-centralized mapping at a given point of triangular algebras is a centralizer. These results are then
openaire +3 more sources
Efficient Simulation of Open Quantum Systems on NISQ Trapped‐Ion Hardware
Advanced Quantum Technologies, EarlyView.Open quantum systems exhibit rich dynamics that can be simulated efficiently on quantum computers, allowing us to learn more about their behavior. This work applies a new method to simulate certain open quantum systems on noisy trapped‐ion quantum hardware.
Colin Burdine +3 more
wiley +1 more source
Cocharacters of upper triangular matrices [PDF]
International Journal of Group Theory, 2013 We survey some recent results on cocharacters of upper triangularmatrices. In particular, we deal both with ordinary and graded cocharactersequence; we list the principal combinatorial results; we show di erent tech-niques in order to solve similar ...
Lucio Centrone
doaj
International Journal of Mathematics and Mathematical Sciences, 2012 Let Cl+1(R) be the 2(l+1)×2(l+1) matrix symplectic Lie algebra over a commutative ring R with 2 invertible. Then tl+1CR = {m-1m-20-m-1T ∣ m̅1 is an l+1 upper triangular matrix, m̅2T=m̅2, over R} is the solvable subalgebra of Cl+1(R).
Xing Tao Wang, Lei Zhang
doaj +1 more source
The role of identification in data‐driven policy iteration: A system theoretic study
International Journal of Robust and Nonlinear Control, EarlyView.Abstract The goal of this article is to study fundamental mechanisms behind so‐called indirect and direct data‐driven control for unknown systems. Specifically, we consider policy iteration applied to the linear quadratic regulator problem. Two iterative procedures, where data collected from the system are repeatedly used to compute new estimates of ...
Bowen Song, Andrea Iannelli
wiley +1 more source
The Ribbon Elements of the Quantum Double of Generalized Taft–Hopf Algebra
MathematicsLet s, t be two positive integers and k be an algebraically closed field with char (k)∤st. We show that the Drinfeld double D(⋀st,t*cop) of generalized Taft–Hopf algebra ⋀st,t*cop has ribbon elements if and only if t is odd.
Hua Sun +4 more
doaj +1 more source
Towards a Semiautonomous Young Spruce Forest Late Cleaning
Journal of Field Robotics, EarlyView.ABSTRACT Cleaning a seedling spruce stand is an important silvicultural task required to help the young spruce trees thrive. It is usually manual work with a clearing saw. Mechanized solutions have been proposed, but they have not worked out well, since the driver has challenges in seeing the seedling trees that should be left growing.
Issouf Ouattara +3 more
wiley +1 more source
Nonlinear Jordan triple derivable mapping on ∗-type trivial extension algebras
Electronic Research ArchiveThe aim of the paper was to give a description of nonlinear Jordan triple derivable mappings on trivial extension algebras. We proved that every nonlinear Jordan triple derivable mapping on a $ 2 $-torsion free $ * $-type trivial extension algebra is a ...
Xiuhai Fei , Cuixian Lu, Haifang Zhang
doaj +1 more source