Results 81 to 90 of about 3,603,035 (255)
Discrete Dynamics in Nature and Society, 2015 With an error corrector via principal branch of the mth root of a function-to-function ratio, we propose optimal quartic-order multiple-root finders for nonlinear equations.
Young Ik Kim, Young Hee Geum
doaj +1 more source
On the solutions of a family of quartic Thue equations [PDF]
Mathematics of Computation, 1999 In this paper, we solve a certain family of diophantine equations associated with a family of cyclic quartic number fields. In fact, we prove that for n
openaire +1 more source
Deep Underground Science and Engineering, EarlyView.This study investigated the spatial patterns and development mechanisms of urban underground space (UUS) in Shanghai using underground points of interest data. It revealed distinct development mechanisms between the main city and suburbs, highlighting the need for differentiated UUS planning and policies to optimize underground space resources ...
Chenxiao Ma +3 more
wiley +1 more source
Journal of MathematicsIn the current study, we introduce a system of functional equations (FEs) deriving from the mixed type additive–quadratic and the mixed-type cubic–quartic FEs which describes a multimixed additive–quadratic–cubic–quartic mapping.
Siriluk Donganont, Abasalt Bodaghi
doaj +1 more source
Stability of Quartic Functional Equation in Modular Spaces via Hyers and Fixed-Point Methods
Mathematics, 2022 In this work, we introduce a new type of generalised quartic functional equation and obtain the general solution. We then investigate the stability results by using the Hyers method in modular space for quartic functional equations without using the ...
Syed Abdul Mohiuddine +3 more
doaj +1 more source
Alternative Data for Realised Volatility Forecasting: Limit Order Book and News Stories
International Journal of Finance &Economics, EarlyView.ABSTRACT We examine whether two major alternative data sources, limit order book information and firm‐specific news, provide incremental predictive information for daily realised volatility forecasting within the HAR‐family, using a parsimonious framework to ensure practical implementation and comparability. The framework is designed for practical real‐
Eghbal Rahimikia, Ser‐Huang Poon
wiley +1 more source
Laser &Photonics Reviews, EarlyView.A Cr3+/La3+ codoped Sr3Zr2O7 NIR phosphor showing luminescence at ∼960 nm with high IQE/EQE (92.4%/57.5%) and good thermal stability was developed. La3+ stabilizes Cr3+ and induces Cr3+ pairs, enabling efficient blue‐to‐NIR conversion for underwater wireless optical communication.
Zhiyuan Pan +5 more
wiley +1 more source
Pseudo-differential equations, and the Bethe ansatz for the classical Lie algebras [PDF]
, 2007 The correspondence between ordinary differential equations and Bethe ansatz equations for integrable lattice models in their continuum limits is generalised to vertex models related to classical simple Lie algebras.
Dunning, Clare +4 more
core +1 more source
On the Superstrings-Induced Four-Dimensional Gravity and Its Applications to Cosmology
Advances in High Energy Physics, 2008 We review the status of the fourth-order (quartic in the spacetime curvature) terms induced by superstrings/M-theory (compactified on a warped torus) in the leading order with respect to the Regge slope parameter, and study their (nonperturbative) impact
Masao Iihoshi, Sergei V. Ketov
doaj +1 more source
WKB solutions of the Schrödinger equation with a quartic potential
AIP Advances, 2023 The Schrödinger equation with a quartic potential is a fundamental equation describing the physics of stimulated side scattering, but no exact, even approximate solution has been formulated yet.
C. Z. Xiao, Q. Wang, J. F. Myatt
doaj +1 more source