Results 101 to 110 of about 4,759 (244)
A Comparative Review of Specification Tests for Diffusion Models
International Statistical Review, EarlyView.Summary Diffusion models play an essential role in modelling continuous‐time stochastic processes in the financial field. Therefore, several proposals have been developed in the last decades to test the specification of stochastic differential equations.
A. López‐Pérez +3 more
wiley +1 more source
Perturbative solutions of N = 1 ∗ $$ \mathcal{N}={1}^{\ast } $$ holography on S 4
Journal of High Energy Physics, 2019 We apply the recently proposed perturbative technique to solve the supergravity BPS equations of N = 1 ∗ $$ \mathcal{N}={1}^{\ast } $$ theories put on S 4.
Nakwoo Kim, Se-Jin Kim
doaj +1 more source
Diagonal Quartic Surfaces And Transcendental Elements Of The Brauer Group [PDF]
We exhibit central simple algebras over the function field of a diagonal quartic surface over the complex numbers that represent the 2-torsion part of its Brauer group.
Ieronymou, Evis
core +1 more source
Quartic monoid surfaces with maximum number of lines
, 2022 In 1884 the German mathematician Karl Rohn published a substantial paper (Rohn, 1884) on the properties of quartic surfaces with triple points, proving (among many other things) that the maximum number of lines contained in a quartic monoid surface is 31.
Beltrametti M. C., Torrente M., Logar A.
core +1 more source
Inference via the Skewness‐Kurtosis Set
International Statistical Review, EarlyView.Summary Kurtosis minus squared skewness is bounded from below by 1, but for unimodal distributions, this parameter is bounded by 189/125. In some applications, it is natural to compare distributions by comparing their kurtosis‐minus‐squared‐skewness parameters. The asymptotic behavior of the empirical version of this parameter is studied here for i.i.d.
Chris A. J. Klaassen, Bert van Es
wiley +1 more source
Computers & Mathematics with Applications, 2013 We catalogue the numerical properties of approximations using two novel types of radial basis functions @f(r). The QG species is a basis of exponentials of quartic argument: f(x)~f^R^B^F(x;@a,h)=@?"j"="1^Na"jexp(-[@a/h]^4(x-x"j)^4) where the x"j are the RBF centers and also the interpolation points.
John P. Boyd 0001, Philip W. McCauley
openaire +1 more source
Some implications of a quartic loss function
, 2007 Motivated by a central banker with a symmetric but non-quadratic loss function, we show in this note that the approximations of two plausible loss functions of this type will include a quartic term. For skewed distributions, we establish that such a loss
Aretz, Kevin, Peel, David
core
Measuring Frame Evolution: Smoothed Temporal Framing Trajectories in Complex Policy Debates
JCMS: Journal of Common Market Studies, EarlyView.Abstract The European Union faces long‐term governance challenges in contested domains, such as migration management, health data sharing, and facial recognition technology. Across these fields, political debates are shaped by shifting ways in which actors frame problems and solutions. Understanding how such framing contests evolve over time is crucial
Philip Leifeld, Kristijan Garic
wiley +1 more source
AIP AdvancesLow lattice thermal conductivity (κl) is a crucial factor for higher figure-of merit and hence the efficiency of thermoelectric generators. There are several reports on intrinsically low κl values in two-dimensional (2D) van der Waals materials using ...
Eesha Andharia +3 more
doaj +1 more source
Generation and Nonlinear Dynamical Analyses of Fractional-Order Memristor-Based Lorenz Systems
Entropy, 2014 In this paper, four fractional-order memristor-based Lorenz systems with the flux-controlled memristor characterized by a monotone-increasing piecewise linear function, a quadratic nonlinearity, a smooth continuous cubic nonlinearity and a quartic ...
Huiling Xi, Yuxia Li, Xia Huang
doaj +1 more source